MDEV-19723 Assertion `je->state == JST_KEY' failed while SELECT...

MDEV-19723 Assertion `je->state == JST_KEY' failed while SELECT ST_GEOMFROMGEOJSON() and Assertion `!mysql_bin_log.is_open() || thd.is_current_stmt_binlog_format_row()'

The invalid GeoJSON case wasn't handled here.

mysql-test/r/gis-json.result

@@ -104,6 +104,9 @@ a
 NULL
 Warnings:
 Warning	4076	Incorrect GeoJSON format - empty 'coordinates' array.
+SELECT ST_GEOMFROMGEOJSON("{ \"type\": \"Feature\", \"geometry\": [10, 20] }");
+ST_GEOMFROMGEOJSON("{ \"type\": \"Feature\", \"geometry\": [10, 20] }")
+NULL
 #
 # End of 10.2 tests
 #

mysql-test/t/gis-json.test

@@ -44,6 +44,8 @@ SELECT st_astext(st_geomfromgeojson('{"type": "MultiLineString","coordinates": [
 SELECT st_astext(st_geomfromgeojson('{"type": "Polygon","coordinates": []}')) as a;
 SELECT st_astext(st_geomfromgeojson('{"type": "MultiPolygon","coordinates": []}')) as a;
 
+SELECT ST_GEOMFROMGEOJSON("{ \"type\": \"Feature\", \"geometry\": [10, 20] }");
+
 --echo #
 --echo # End of 10.2 tests
 --echo #

sql/spatial.cc

@@ -605,6 +605,7 @@ Geometry *Geometry::create_from_json(Geometry_buffer *buffer,
         if (feature_type_found)
           goto handle_geometry_key;
       }
+      goto err_return;
     }
     else
     {