games/avanor: unbreak build with Clang 6 (C++14 by default)

creature/Uniquem.cpp:628:11: error: cannot initialize return object of type 'int' with an rvalue of
      type 'nullptr_t'
                        return NULL;
                               ^~~~
/usr/include/sys/_null.h:37:14: note: expanded from macro 'NULL'
 #define NULL    nullptr
                 ^~~~~~~

Reported by:	pkg-fallout

1 files changed, 19 insertions, 0 deletions

diff --git a/games/avanor/files/patch-creature__Uniquem.cpp b/games/avanor/files/patch-creature__Uniquem.cpp
new file mode 100644
index 000000000000..bc35b2c62c80
--- /dev/null
+++ b/games/avanor/files/patch-creature__Uniquem.cpp
@@ -0,0 +1,19 @@
+creature/Uniquem.cpp:628:11: error: cannot initialize return object of type 'int' with an rvalue of
+      type 'nullptr_t'
+                        return NULL;
+                               ^~~~
+/usr/include/sys/_null.h:37:14: note: expanded from macro 'NULL'
+#define NULL    nullptr
+                ^~~~~~~
+
+--- creature/Uniquem.cpp.orig	2003-12-10 07:03:57 UTC
++++ creature/Uniquem.cpp
+@@ -625,7 +625,7 @@ int XYohjishiro::onGiveItem(XCreature * giver, XItem *
+ 					(*it)->Item()->Identify(1);
+ 					
+ 			}
+-			return NULL;
++			return 0;
+ 		} else
+ 		{
+ 			char tbuf[256];