- fixed missing stdlib.h and string.h includes everywhere
- removed a couple of unneeded stdlib.h and stdio.h includes

diff --git a/graphics/d3dtexture.c b/graphics/d3dtexture.c
index 533bff5..c5ca901 100644
--- a/graphics/d3dtexture.c
+++ b/graphics/d3dtexture.c
@@ -4,6 +4,7 @@
    This files contains the implementation of interface Direct3DTexture2. */
 
 
+#include <string.h>
 #include "config.h"
 #include "wintypes.h"
 #include "winerror.h"