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Update storage class of funcion-scope variables

--- a/decl.c

+++ b/decl.c

@@ -436,7 +436,14 @@

 	if (yytoken != ';') {

 		do {

 			 sym = declarator(tp, NS_IDEN, ID_EXPECTED);

-			/* assign storage class */

+			switch (sclass) {

+			case REGISTER: sym->s.isregister = 1; break;

+			case STATIC: sym->s.isstatic = 1; break;

+			case EXTERN: /* TODO: */; break;

+			case TYPEDEF: /* TODO: */;break;

+			case AUTO: /* TODO: */; break;

+			default: sym->s.isauto = 1;

+			}

 			if (accept('='))

 				initializer(sym->type);

 		} while (accept(','));