Bugs in gpmf-parser

[leocstone]

Hello,

I have recently discovered inputs that trigger two separate bugs in the gpmf-parser binary. One causes a read and write to invalid pointers, and the other causes a write to an invalid pointer. Both cause the program to terminate with an access violation exception. Tested on Windows 10 with the following command line:
gpmf-parser.exe
Please find the inputs attached.
inputs.zip

[dnewman-gpsw]

Thank you. I just pushed a fix to main. This was failure to handle a corrupted 'stsz' atom.