GDAL 1.11.5 patch for dealing with json-c lib 0.13

gdal1-json-c-013.patch

diff --git a/frmts/arg/argdataset.cpp b/frmts/arg/argdataset.cpp
index 5a7e646..c40101a 100644
--- a/frmts/arg/argdataset.cpp
+++ b/frmts/arg/argdataset.cpp
@@ -55,6 +55,10 @@ static float CPLNaN(void)
 #  endif
 #endif
 
+#ifndef error_ptr
+#define error_ptr(error) ((void*)error)
+#endif
+
 /************************************************************************/
 /* ==================================================================== */
 /*				ARGDataset				                                */
diff --git a/ogr/ogrsf_frmts/geojson/ogrgeojsonwriter.cpp b/ogr/ogrsf_frmts/geojson/ogrgeojsonwriter.cpp
index 198b134..5612632 100644
--- a/ogr/ogrsf_frmts/geojson/ogrgeojsonwriter.cpp
+++ b/ogr/ogrsf_frmts/geojson/ogrgeojsonwriter.cpp
@@ -27,11 +27,16 @@
  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  * DEALINGS IN THE SOFTWARE.
  ****************************************************************************/
+
+#define JSON_C_VER_013 (13 << 8)
+
 #include "ogrgeojsonwriter.h"
 #include "ogrgeojsonutils.h"
 #include "ogr_geojson.h"
 #include <json.h> // JSON-C
-#include <json_object_private.h>
+#if (!defined(JSON_C_VERSION_NUM)) || (JSON_C_VERSION_NUM < JSON_C_VER_013)
+#include <json_object_private.h> // just for sizeof(struct json_object)
+#endif
 #include <printbuf.h>
 #include <ogr_api.h>
 #include <ogr_p.h>
@@ -607,12 +612,17 @@ static int OGR_json_double_with_precision_to_string(struct json_object *jso,
                                                     CPL_UNUSED int flags)
 {
     char szBuffer[75]; 
-    int nPrecision = (int) (size_t) jso->_userdata;
-    OGRFormatDouble( szBuffer, sizeof(szBuffer), jso->o.c_double, '.', 
+    int nPrecision =
+#if (!defined(JSON_C_VERSION_NUM)) || (JSON_C_VERSION_NUM < JSON_C_VER_013)
+        (int) (size_t) jso->_userdata;
+#else
+        (int) (size_t) json_object_get_userdata(jso);
+#endif
+    OGRFormatDouble( szBuffer, sizeof(szBuffer), json_object_get_double(jso), '.',
                      (nPrecision < 0) ? 15 : nPrecision ); 
     if( szBuffer[0] == 't' /*oobig */ )
     {
-        snprintf(szBuffer, sizeof(szBuffer), "%.18g", jso->o.c_double);
+        snprintf(szBuffer, sizeof(szBuffer), "%.18g",  json_object_get_double(jso));
     }
     return printbuf_memappend(pb, szBuffer, strlen(szBuffer)); 
 }