PsychHID/Linux: Fix memory leak in libusb on init failure.

As found by Yaroslav.
Fix printf bug in Screen and PsychKinectCore

printf() Error reporting string had a %i defined, but no actual
variable whose value to print.
-> These are on non-critical error paths, so no rebuild for mex files.
Can wait until a future release.
Found by Yaroslav.
Fix memory leak on error in FTGL drawtext plugin.

In the unlikely case of an error, we leaked a few bytes of unicode text.
-> Not critical: Recompile can wait for a future release.
Found by Yaroslav.
PsychCV/OpenEyesTracker: Fix memory leak on error condition in svd.

Ok, this is code we don't even build atm, but doesn't hurt to keep it
free from memleak on error.
-> No recompile needed.