graphics/nvidia-texture-tools: unbreak build with Clang 6 (C++14 by default)

src/nvimage/ImageIO.cpp:138:10: error: cannot initialize return object of type 'nv::FloatImage *' with an rvalue of type 'bool'
                return false;
                       ^~~~~
src/nvimage/ImageIO.cpp:236:12: error: cannot initialize return object of type 'nv::Image *' with an rvalue of type 'bool'
                                return false;
                                       ^~~~~
src/nvimage/ImageIO.cpp:257:11: error: cannot initialize return object of type 'nv::Image *' with an rvalue of type 'bool'
                        return false;
                               ^~~~~
src/nvimage/ImageIO.cpp:624:10: error: cannot initialize return object of type 'nv::Image *' with an rvalue of type 'bool'
                return false;
                       ^~~~~
src/nvimage/ImageIO.cpp:632:10: error: cannot initialize return object of type 'nv::Image *' with an rvalue of type 'bool'
                return false;
                       ^~~~~
src/nvimage/ImageIO.cpp:639:10: error: cannot initialize return object of type 'nv::Image *' with an rvalue of type 'bool'
                return false;
                       ^~~~~

Reported by:	pkg-fallout (blocks 9 ports)
Obtained from:	upstream
Approved by:	portmgr blanket

1 files changed, 76 insertions, 0 deletions

diff --git a/graphics/nvidia-texture-tools/files/patch-c++11 b/graphics/nvidia-texture-tools/files/patch-c++11
new file mode 100644
index 000000000000..f33c4dd03485
--- /dev/null
+++ b/graphics/nvidia-texture-tools/files/patch-c++11
@@ -0,0 +1,76 @@
+https://github.com/castano/nvidia-texture-tools/commit/65b3dfa4a6eb
+
+src/nvimage/ImageIO.cpp:138:10: error: cannot initialize return object of type 'nv::FloatImage *' with an rvalue of type 'bool'
+                return false;
+                       ^~~~~
+src/nvimage/ImageIO.cpp:236:12: error: cannot initialize return object of type 'nv::Image *' with an rvalue of type 'bool'
+                                return false;
+                                       ^~~~~
+src/nvimage/ImageIO.cpp:257:11: error: cannot initialize return object of type 'nv::Image *' with an rvalue of type 'bool'
+                        return false;
+                               ^~~~~
+src/nvimage/ImageIO.cpp:624:10: error: cannot initialize return object of type 'nv::Image *' with an rvalue of type 'bool'
+                return false;
+                       ^~~~~
+src/nvimage/ImageIO.cpp:632:10: error: cannot initialize return object of type 'nv::Image *' with an rvalue of type 'bool'
+                return false;
+                       ^~~~~
+src/nvimage/ImageIO.cpp:639:10: error: cannot initialize return object of type 'nv::Image *' with an rvalue of type 'bool'
+                return false;
+                       ^~~~~
+
+--- src/nvimage/ImageIO.cpp.orig	2010-05-15 09:12:05 UTC
++++ src/nvimage/ImageIO.cpp
+@@ -135,7 +135,7 @@ FloatImage * nv::ImageIO::loadFloat(const char * fileN
+ 	StdInputStream stream(fileName);
+ 	
+ 	if (stream.isError()) {
+-		return false;
++		return NULL;
+ 	}
+ 	
+ 	return loadFloat(fileName, stream);
+@@ -233,7 +233,7 @@ Image * nv::ImageIO::loadTGA(Stream & s)
+ 		case TGA_TYPE_INDEXED:
+ 			if( tga.colormap_type!=1 || tga.colormap_size!=24 || tga.colormap_length>256 ) {
+ 				nvDebug( "*** ImageIO::loadTGA: Error, only 24bit paletted images are supported.\n" );
+-				return false;
++				return NULL;
+ 			}
+ 			pal = true;
+ 			break;
+@@ -254,7 +254,7 @@ Image * nv::ImageIO::loadTGA(Stream & s)
+ 
+ 		default:
+ 			nvDebug( "*** ImageIO::loadTGA: Error, unsupported image type.\n" );
+-			return false;
++			return NULL;
+ 	}
+ 
+ 	const uint pixel_size = (tga.pixel_size/8);
+@@ -621,7 +621,7 @@ Image * nv::ImageIO::loadPNG(Stream & s)
+ 	png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
+ 	if (png_ptr == NULL) {
+ 	//	nvDebug( "*** LoadPNG: Error allocating read buffer in file '%s'.\n", name );
+-		return false;
++		return NULL;
+ 	}
+ 
+ 	// Allocate/initialize a memory block for the image information
+@@ -629,14 +629,14 @@ Image * nv::ImageIO::loadPNG(Stream & s)
+ 	if (info_ptr == NULL) {
+ 		png_destroy_read_struct(&png_ptr, NULL, NULL);
+ 	//	nvDebug( "*** LoadPNG: Error allocating image information for '%s'.\n", name );
+-		return false;
++		return NULL;
+ 	}
+ 
+ 	// Set up the error handling
+ 	if (setjmp(png_jmpbuf(png_ptr))) {
+ 		png_destroy_read_struct(&png_ptr, &info_ptr, NULL);
+ 	//	nvDebug( "*** LoadPNG: Error reading png file '%s'.\n", name );
+-		return false;
++		return NULL;
+ 	}
+ 
+ 	// Set up the I/O functions.