- The x86 inline assembler version of the SDL macro SDL_revcpy() sets the

  direction flag ("std"), but does not clear it ("cld").  This is invalid
  according to GCC (inline assembler, which sets the direction flag,
  must reset it[0]) and the SYS V ABI (functions must leave with the
  direction flag cleared[1]). The macro is (indirectly, exact call
  sequence below) used in SDL_BlitSurface(), so this call sometimes
  returns with the direction flag set. This happens for bliting a surface
  onto itself with the destination coordinates set right/down of the source
  coordinates (typical use of this is scrolling left/up).  Later on other
  parts of the code (like inlined memcpy()) cause memory corruption. [1]
- Give maintaintership to submitter (as discussed on irc)

PR:	ports/120052 [1]

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