Avoid freeing potentially uninitialised variable.
Fix errors when compiling shaders with UBOs disabled
Fix up whitespace in shaders.cpp
Fix whitespace in glwrap.cpp
Merge pull request #1336 from supertuxkart/shader-fix

Fix shader problems when UBO is disabled.
Add lightviz to spheremap
Add lightviz to instanced node
Merge remote-tracking branch 'origin/master' into MaterialsRefactor
Spheremap: fix low brightness
Merge remote-tracking branch 'origin/master' into MaterialsRefactor