json: fix uninitialized variables

json.c: In function ‘json_parse_ex’:
json.c:260:30: warning: ‘string_length’ may be used uninitialized in this function [-Wmaybe-uninitialized]
json.c:358:16: warning: ‘string’ may be used uninitialized in this function [-Wmaybe-uninitialized]

1 files changed, 2 insertions, 2 deletions

diff --git a/lib/json.c b/lib/json.c
index 52e22d0e..fb973001 100644
--- a/lib/json.c
+++ b/lib/json.c
@@ -212,8 +212,8 @@ json_value * json_parse_ex (json_settings * settings, const json_char * json, ch
    {
       json_uchar uchar;
       unsigned char uc_b1, uc_b2, uc_b3, uc_b4;
-      json_char * string;
-      unsigned int string_length;
+      json_char * string = 0;
+      unsigned int string_length = 0;
 
       top = root = 0;
       flags = flag_seek_value;