MB-6961 Fix validation of numbers as JSON

Change-Id: Ibe14f516283ccdfd26795a0b9e9659d3b5cf8932
Reviewed-on: http://review.couchbase.org/21901
Reviewed-by: Chris Anderson <jchris@couchbase.com>
Reviewed-by: Chiyoung Seo <chiyoung.seo@gmail.com>
Tested-by: Chiyoung Seo <chiyoung.seo@gmail.com>
Reviewed-by: Damien Katz <damien@couchbase.com>
Reviewed-by: Steve Yen <steve.yen@gmail.com>

tools/JSON_checker.c

@@ -454,7 +454,7 @@ checkUTF8JSON(const unsigned char* data, size_t size) {
         //Feed fake space to the validator to force it to finish validating
         //numerical values, iff it hasn't marked the current stream as valid
         if(jc->state != OK) {
-            badjson = JSON_checker_char(jc, 32);
+            badjson = !JSON_checker_char(jc, 32);
         }
         if(!badjson) {
             badjson = !JSON_checker_done(jc);