a number as a field name (part 2)

don't crash
    a test program:
    ================
    typedef struct X { int len; } X;
    #define init(s,len)  s.len = len;
    int main(void) {
	X myX;
	init(myX,10);
	return 0;
    }
    ================
    After a patch:
    	error: field name expected

tccgen.c

@@ -4166,6 +4166,8 @@ ST_FUNC void unary(void)
             if (tok == TOK_CDOUBLE)
                 expect("field name");
             next();
+            if (tok == TOK_CINT || tok == TOK_CUINT)
+                expect("field name");
             s = vtop->type.ref;
             /* find field */
             tok |= SYM_FIELD;