Previously, it seems, the continuity counter was incremented freely and the masking was 
done when using the counter. This is ok, but every now and then some pids would reach 
the special "pid unused" value and spawn a spurious debug message, which shouldn't 
happen with this fix

wxwidgets/*: Readd the labels in the buttons. Should solve the l10n problems on win32. (Revert [14249]) (Refs #646)
po/*: Update the Po to reflect the changes.

* another update of the German translation by Mathias C. Berens | welcome-soft <berens@welcome-soft.de>. Thanks again.

* do only check-out revision 501 of the x264 library, because 502 breaks the linkage of the x264-module on ppc-platforms

* try to fix a crash in case p_input invalidates while waiting for the variables. Found by joneskoo, fix inspired by Meuuh.