wined3d: Initialise WINED3DVERTEXELEMENT's Reg field in

dlls/wined3d/vertexdeclaration.c

@@ -383,6 +383,7 @@ static HRESULT IWineD3DVertexDeclarationImpl_ParseDeclaration9(IWineD3DVertexDec
     This->pDeclarationWine = HeapAlloc(GetProcessHeap(), 0, This->declaration9NumElements * sizeof(WINED3DVERTEXELEMENT));
     for(i = 0; i < This->declaration9NumElements; ++i) {
         memcpy(This->pDeclarationWine + i, This->pDeclaration9 + i, sizeof(D3DVERTEXELEMENT9));
+        This->pDeclarationWine[i].Reg = -1;
     }
 
     This->declarationWNumElements = This->declaration9NumElements;

include/wine/wined3d_types.h

@@ -507,7 +507,7 @@ typedef struct _WINED3DVERTEXELEMENT {
   BYTE    Method;
   BYTE    Usage;
   BYTE    UsageIndex;
-  BYTE    Reg; /* DirectX 8 */
+  int     Reg; /* DirectX 8 */
 } WINED3DVERTEXELEMENT, *LPWINED3DVERTEXELEMENT;