Mitigate Bug 728: Java Web Start Shutdown: Exception "java.lang.IllegalStateException: zip file closed" on OSX 10.8.3 and Java 1.7.0_17

OS version: Mac OS X 10.8.3
Java version: 1.7.0_17

Catch any occuring exception at GLDrawable shutdown, report them briefly and verbose w/ DEBUG enabled.
Fix Bug 745: NPE - QTT definition shall be allowd to _follow_ SOF (frame) - Reference QTT via QTT[] passed to frame, validate after parsing.