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Removed ; and IDENTIFIER checks in specifier

These checks should be done in other place, because there is situation where
they are not needed.

--- a/decl.c

+++ b/decl.c

@@ -115,20 +115,6 @@

 		case STRUCT:	/* TODO */

 		case UNION:	/* TODO */

 		case ENUM:	/* TODO */

-		case ';':

-			if (t != NULL) {

-				warning("useless type name in empty "

-					"declaration");

-			}

-			goto repeat;

-		case IDENTIFIER:

-			/* TODO: deal with user types */

-			if (t == NULL) {

-				warning_error(user_opt.implicit_int,

-					      "type defaults to 'int' "

-					      "in declaration of", yytext);

-				return T_INT;

-			}

 		default:

 			return t;

 		}