4.88. libexif

When opening an invalid or corrupt Exif file, libexif allocated huge amounts of memory. This could cause a memory exhaustion situation and the system then became unresponsive, which eventually resulted in a crash of the running graphics application, such as Gimp. The libexif code has been modified to check validity of the Exif file before it allocates the memory. Memory is now allocated properly and graphic programs no longer crash under these circumstances.