Removes a memory leak on the JSON parser

Author: zimmerle

CHANGES

@@ -1,6 +1,8 @@
 v3.0.4 - YYYY-MMM-DD (to be released)
 -------------------------------------
 
+ - Removes a memory leak on the JSON parser
+   [@zimmerle]
  - Enables LMDB on the regression tests.
    [Issue #2011, #2008 - @WGH-, @mdunc]
  - Fix: Extra whitespace in some configuration directives causing error

src/request_body_processor/json.cc

@@ -87,10 +87,11 @@ bool JSON::processChunk(const char *buf, unsigned int size, std::string *err) {
     m_status = yajl_parse(m_handle,
         (const unsigned char *)buf, size);
     if (m_status != yajl_status_ok) {
-        const unsigned char *e = yajl_get_error(m_handle, 0,
+        unsigned char *e = yajl_get_error(m_handle, 0,
             (const unsigned char *)buf, size);
         /* We need to free the yajl error message later, how to do this? */
         err->assign((const char *)e);
+        yajl_free_error(m_handle, e);
         return false;
     }
 
@@ -102,9 +103,10 @@ bool JSON::complete(std::string *err) {
     /* Wrap up the parsing process */
     m_status = yajl_complete_parse(m_handle);
     if (m_status  != yajl_status_ok) {
-        const unsigned char *e = yajl_get_error(m_handle, 0, NULL, 0);
+        unsigned char *e = yajl_get_error(m_handle, 0, NULL, 0);
         /* We need to free the yajl error message later, how to do this? */
         err->assign((const char *)e);
+        yajl_free_error(m_handle, e);
         return false;
     }