[core] fix memory leak in configparser_merge_data

Release op1 memory on failure; fixes some theoretical memory leaks (a
failure results in early exit anyway).

From: Stefan Bühler <stbuehler@web.de>

git-svn-id: svn://svn.lighttpd.net/lighttpd/branches/lighttpd-1.4.x@3101 152afb58-edef-0310-8abb-c4023f1b3aa9

1 files changed, 1 insertions, 0 deletions

diff --git a/src/configparser.y b/src/configparser.y
index 10241456..24efb6b0 100644
--- a/src/configparser.y
+++ b/src/configparser.y
@@ -71,6 +71,7 @@ data_unset *configparser_merge_data(data_unset *op1, const data_unset *op2) {
       return (data_unset *)ds;
     } else {
       fprintf(stderr, "data type mismatch, cannot merge\n");
+      op1->free(op1);
       return NULL;
     }
   }