fixed zero arg macro parse

tcc.c

@@ -3812,7 +3812,7 @@ static int macro_subst_tok(TokenString *tok_str,
             /* NOTE: empty args are allowed, except if no args */
             for(;;) {
                 /* handle '()' case */
-                if (!args && tok == ')')
+                if (!args && !sa && tok == ')')
                     break;
                 if (!sa)
                     error("macro '%s' used with too many args",

tcctest.c

@@ -253,6 +253,12 @@ void macro_test(void)
     /* test macro substituion inside args (should not eat stream) */
     printf("qq=%d\n", qq(qq)(2));
 
+    /* test zero argument case. NOTE: gcc 2.95.x does not accept a
+       null argument without a space. gcc 3.2 fixes that. */
+
+#define qq1(x) 1
+    printf("qq1=%d\n", qq1( ));
+
     /* comment with stray handling *\
 /
        /* this is a valid *\/ comment */