ogr_core.h: suppress warning when building with -Wpedantic for C < 23

Fixes #2322

ogr/ogr_core.h

@@ -391,6 +391,13 @@ typedef int OGRBoolean;
 /*      ogr_geometry.h related definitions.                             */
 /* -------------------------------------------------------------------- */
 
+#if defined(HAVE_GCC_DIAGNOSTIC_PUSH) && __STDC_VERSION__ < 202311L
+// wkbPoint25D and friends cause warnings with -Wpedantic prior to C23
+// Cf https://github.com/OSGeo/gdal/issues/2322
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wpedantic"
+#endif
+
 /**
  * List of well known binary geometry types.  These are used within the BLOBs
  * but are also returned from OGRGeometry::getGeometryType() to identify the
@@ -512,6 +519,10 @@ typedef enum
 #endif
 } OGRwkbGeometryType;
 
+#if defined(HAVE_GCC_DIAGNOSTIC_PUSH) && __STDC_VERSION__ < 202311L
+#pragma GCC diagnostic pop
+#endif
+
 /* clang-format off */
 /**
  * Output variants of WKB we support.