libjson: Clip to INT32_MIN for json_type_double in json_object_get_in…

…t().

json-c/json-c#346
Follow on to r39758.
Found by autofuzz.

git-svn-id: https://svn.osgeo.org/gdal/trunk/gdal@39777 f0d54148-0727-0410-94bb-9a71ac55c965

ogr/ogrsf_frmts/geojson/libjson/json_object.c

@@ -517,6 +517,8 @@ int32_t json_object_get_int(struct json_object *jso)
 	else
 		return (int32_t)cint64;
   case json_type_double:
+    if (jso->o.c_double <= INT32_MIN)
+      return INT32_MIN;
     if (jso->o.c_double >= INT32_MAX)
       return INT32_MAX;
     return (int32_t)jso->o.c_double;