Fix file descriptor leak on error in rtnl_hash_initialize()

Detected by cppcheck.

Signed-off-by: Thomas Jarosch <thomas.jarosch@intra2net.com>
diff --git a/lib/rt_names.c b/lib/rt_names.c
index 30d43cd..a290021 100644
--- a/lib/rt_names.c
+++ b/lib/rt_names.c
@@ -54,6 +54,7 @@
 		    sscanf(p, "%d %s #", &id, namebuf) != 2) {
 			fprintf(stderr, "Database %s is corrupted at %s\n",
 				file, p);
+			fclose(fp);
 			return;
 		}
 
@@ -91,6 +92,7 @@
 		    sscanf(p, "%d %s #", &id, namebuf) != 2) {
 			fprintf(stderr, "Database %s is corrupted at %s\n",
 				file, p);
+			fclose(fp);
 			return;
 		}