Fix exifRotation for older php versions
Fix exifRotation for older php versions

chr() needs an ascii code as integer.
Not a string with 0x hex code (apperently 'some' php versions magically convert this to the wanted integer, but it still makes no sense at all)

Other occurences of chr() in this method also don't use a string

kaufmo/koala-framework,kaufmo/koala-framework,koala-framework/koala-framework,kaufmo/koala-framework,koala-framework/koala-framework