d3dx9: Add the _D3DXERR enumeration.

include/d3dx9.h

@@ -25,4 +25,19 @@
 #include "d3dx9math.h"
 #include "d3dx9core.h"
 
+#define _FACDD 0x876
+#define MAKE_DDHRESULT(code) MAKE_HRESULT(1, _FACDD, code)
+
+enum _D3DXERR {
+    D3DXERR_CANNOTMODIFYINDEXBUFFER = MAKE_DDHRESULT(2900),
+    D3DXERR_INVALIDMESH             = MAKE_DDHRESULT(2901),
+    D3DXERR_CANNOTATTRSORT          = MAKE_DDHRESULT(2902),
+    D3DXERR_SKINNINGNOTSUPPORTED    = MAKE_DDHRESULT(2903),
+    D3DXERR_TOOMANYINFLUENCES       = MAKE_DDHRESULT(2904),
+    D3DXERR_INVALIDDATA             = MAKE_DDHRESULT(2905),
+    D3DXERR_LOADEDMESHASNODATA      = MAKE_DDHRESULT(2906),
+    D3DXERR_DUPLICATENAMEDFRAGMENT  = MAKE_DDHRESULT(2907),
+    D3DXERR_CANNOTREMOVELASTITEM    = MAKE_DDHRESULT(2908),
+};
+
 #endif