Fixed bugs #47675 and #64577 (fd leak on Solaris)

Author: rlerdorf

main/main.c

@@ -2397,8 +2397,8 @@ PHPAPI int php_execute_script(zend_file_handle *primary_file TSRMLS_DC)
 {
 	zend_file_handle *prepend_file_p, *append_file_p;
 	zend_file_handle prepend_file = {0}, append_file = {0};
-#if HAVE_BROKEN_GETCWD
-	int old_cwd_fd = -1;
+#if HAVE_BROKEN_GETCWD 
+	volatile int old_cwd_fd = -1;
 #else
 	char *old_cwd;
 	ALLOCA_FLAG(use_heap)