Revert "tccpp: Allow local labels to start with a dot"

This reverts commit f740485a5a.

It breaks access to structure elements starting with L

tccasm.c

@@ -761,11 +761,8 @@ static int tcc_assemble_internal(TCCState *s1, int do_preprocess)
             opcode = tok;
             next();
             if (tok == ':') {
-                char * label = get_tok_str(opcode, NULL);
-
                 /* new label */
-                asm_new_label(s1, opcode,
-                    (label && label[0] == '.' && label[1] == 'L') ? 1 : 0);
+                asm_new_label(s1, opcode, 0);
                 next();
                 goto redo;
             } else if (tok == '=') {