JPEG: avoir crash when JPEG error occurs in Restart() called from optimized IRasterIO() implementation

git-svn-id: https://svn.osgeo.org/gdal/trunk@28212 f0d54148-0727-0410-94bb-9a71ac55c965
GTiff direct JPEG copy: fix memleak in case of JPEG error during decompression

git-svn-id: https://svn.osgeo.org/gdal/trunk@28213 f0d54148-0727-0410-94bb-9a71ac55c965