LP:804259 - Second assertion in Gis_geometry_collection::init_from_opresult in maria-5.3-gis

Even after the fix for bug 801243 , the server still asserts the same way with the following query:

SELECT AsText( ST_UNION( MultiPolygonFromText(' MULTIPOLYGON( ( ( 2 2 , 2 8 , 8 8 , 8 2 , 2 2 ) , ( 4 4 , 4 6 , 6 6 , 6 4 , 4 4 ) ) , ( ( 0 0 , 8 3 , 7 4 , 0 0 ) ) , ( ( 2 2 , 2 8 , 8 8 , 8 2 , 2 2 ) , ( 4 4 , 4 6 , 6 6 , 6 4 , 4 4 ) ) ) ') , MultiPolygonFromText(' MULTIPOLYGON( ( ( 0 0 , 1 9 , 4 6 , 0 0 ) ) , ( (0 5, 3 5, 3 4, 1 4 , 1 3 , 3 3 , 3 0 , 0 0 , 0 5), ( 1 1 , 2 1 , 2 2 , 1 2 , 1 1 ) ) , ( ( 7 7 , 4 7, 6 3, 7 2 , 7 7 ) ) , ( (0 5, 3 5, 3 4, 1 4 , 1 3 , 3 3 , 3 0 , 0 0 , 0 5), ( 1 1 , 2 1 , 2 2 , 1 2 , 1 1 ) ) ) ') ) )