Fixed gcc warning in _splitpath().

src/xpdev/dirwrap.c

@@ -105,7 +105,7 @@ void DLLCALL _splitpath(const char *path, char *drive, char *dir, char *fname, c
 	if(p==NULL)
 		p=strrchr(dir,'\\');
 	if(p==NULL) {
-		p=path;
+		p=(char*)path;
 		dir[0]=0;
 	} else {
 		*p=0;	/* truncate dir */