tccgen: inline_functions double free fix

Fix double free of the inline function token_string which
could happen when an error/longjmp occurred while compiling
the inline function.

tccpp.c

@@ -1124,8 +1124,7 @@ ST_FUNC void end_macro(void)
         str->alloc = 3; /* just mark as finished */
     } else {
         tok_str_free(str->str);
-        if (str->alloc == 1)
-            tal_free(tokstr_alloc, str);
+        tal_free(tokstr_alloc, str);
     }
 }