Fix some warnings found by FlexeLint.
diff --git a/lib/zip_set_archive_comment.c b/lib/zip_set_archive_comment.c
index 4382bc4..8c04246 100644
--- a/lib/zip_set_archive_comment.c
+++ b/lib/zip_set_archive_comment.c
@@ -49,7 +49,7 @@
 	return -1;
     }
 
-    if (len > MAXCOMLEN || (len > 0 && comment == NULL)) {
+    if (len > 0 && comment == NULL) {
 	_zip_error_set(&za->error, ZIP_ER_INVAL, 0);
 	return -1;
     }