hdf5_der

[svn-r18084] Fix coverity item 269 + others.  When a error occurred in a function using the
h5tools error framework, the "past_catch" variable would not be set to true
because that statement was before the label that goto jumped to.  This could
cause a failure in the cleanup section to go back to the start of the section,
freeing variables twice, etc.

Moved the label infront of past_catch=TRUE.

Tested: Fedora