MySQL: robustness for huge coordinates in spatial filter

git-svn-id: https://svn.osgeo.org/gdal/trunk@26753 f0d54148-0727-0410-94bb-9a71ac55c965
test_ogrsf: add test for spatial filter with infinity or huge coordinates

git-svn-id: https://svn.osgeo.org/gdal/trunk@26754 f0d54148-0727-0410-94bb-9a71ac55c965