[robocup-humanoid] Bug in Referee box

[Keith Sullivan]

Hi all, 

In testing the latest referee box (from SVN on May 17), there is a bug.
When switching from First Half to Second Half, a NullPointerException is
generated due to the use of the PushingCounter (which is not used in the
HL).  The exception also causes the game timer to not be reset.  So, the
following change to MainGui.java will fix the exception: line 1008
should be 

	if (rulebook.getUsePushingCounter()) {

with a closing '}' at line 1012.  

Keith Sullivan
RoboPatriots