enums and ints are compatible

But like GCC do warn about changes in signedness.  The latter
leads to some changes in gen_assign_cast to not also warn about
  unsigned* = int*
(where GCC warns, but only with extra warnings).

tccasm.c

@@ -612,7 +612,7 @@ static void asm_parse_directive(TCCState *s1)
     case TOK_ASMDIR_global:
     case TOK_ASMDIR_weak:
     case TOK_ASMDIR_hidden:
-    tok1 = tok;
+	tok1 = tok;
 	do { 
             Sym *sym;