Fix the parsing/scanning of empty return statement (#3468)

This patch fixes #3467.

JerryScript-DCO-1.0-Signed-off-by: Robert Fancsik frobert@inf.u-szeged.hu

jerry-core/parser/js/js-scanner.c

@@ -1591,6 +1591,7 @@ scanner_scan_statement (parser_context_t *context_p, /**< context */
 
       if (!(context_p->token.flags & LEXER_WAS_NEWLINE)
           && context_p->token.type != LEXER_SEMICOLON
+          && context_p->token.type != LEXER_EOS
           && context_p->token.type != LEXER_RIGHT_BRACE)
       {
         scanner_context_p->mode = SCAN_MODE_PRIMARY_EXPRESSION;