[PATCH] d3dx9: Don't check for negative enum value.

[Jacek Caban]

Signed-off-by: Jacek Caban <jacek(a)codeweavers.com>
---

Fixes clang warning:
../../../dlls/d3dx9_37/../d3dx9_36/effect.c:1472:12: warning: result of 
comparison of unsigned enum expression < 0 is always false 
[-Wtautological-unsigned-enum-zero-compare]

  dlls/d3dx9_36/effect.c | 2 +-
  1 file changed, 1 insertion(+), 1 deletion(-)