widl: Do not define MIDL_user_allocate and MIDL_user_free as it's already in the psdk.

include/rpcndr.h

@@ -111,6 +111,9 @@ typedef unsigned char boolean;
 #define midl_user_free MIDL_user_free
 #define midl_user_allocate MIDL_user_allocate
 
+void * __RPC_USER MIDL_user_allocate(SIZE_T);
+void __RPC_USER MIDL_user_free(void *);
+
 #define NdrFcShort(s) (unsigned char)(s & 0xff), (unsigned char)(s >> 8)
 #define NdrFcLong(s)  (unsigned char)(s & 0xff), (unsigned char)((s & 0x0000ff00) >> 8), \
   (unsigned char)((s & 0x00ff0000) >> 16), (unsigned char)(s >> 24)

tools/widl/header.c

@@ -1081,14 +1081,6 @@ static void write_rpc_interface_start(FILE *header, const type_t *iface)
 {
   unsigned int ver = get_attrv(iface->attrs, ATTR_VERSION);
   const char *var = get_attrp(iface->attrs, ATTR_IMPLICIT_HANDLE);
-  static int allocate_written = 0;
-
-  if (!allocate_written)
-  {
-    allocate_written = 1;
-    fprintf(header, "void * __RPC_USER MIDL_user_allocate(SIZE_T);\n");
-    fprintf(header, "void __RPC_USER MIDL_user_free(void *);\n\n");
-  }
 
   fprintf(header, "/*****************************************************************************\n");
   fprintf(header, " * %s interface (v%d.%d)\n", iface->name, MAJORVERSION(ver), MINORVERSION(ver));