Fixed error when headerview was set to nil on the CPTableView.
Fixed error when headerview was set to nil on the CPTableView.

primalmotion/cappuccino,cacaodev/cappuccino,krodelin/cappuccino,Rosch/cappuccino,FrankReh/cappuccino,FrankReh/cappuccino,Rosch/cappuccino,Rosch/cappuccino,wangshijin/cappuccino,tancred/cappuccino,zittix/cappuccino,dgvivero/CappCoreData,enquora/cappuccino,tancred/cappuccino,mrcarlberg/cappuccino,tancred/cappuccino,deltaprojects/cappuccino,eventualbuddha/cappuccino,krodelin/cappuccino,eventualbuddha/cappuccino,koamac/Cappuccino,deltaprojects/cappuccino,deltaprojects/cappuccino,cacaodev/cappuccino,cappuccino/cappuccino,enquora/cappuccino,mrcarlberg/cappuccino,cacaodev/cappuccino,Dogild/cappuccino,Dogild/cappuccino,enquora/cappuccino,rgv151/cappuccino,cappuccino/cappuccino,Dogild/cappuccino,FrankReh/cappuccino,krodelin/cappuccino,tolmasky/cappuccino,mrcarlberg/cappuccino,AlexanderMazaletskiy/cappuccino,krodelin/cappuccino,enquora/cappuccino,cappuccino/cappuccino,mrcarlberg/cappuccino,dgvivero/CappCoreData,wangshijin/cappuccino,koamac/Cappuccino,enquora/cappuccino,Dogild/cappuccino,FrankReh/cappuccino,daboe01/cappuccino,kidaa/cappuccino,Rosch/cappuccino,280north/cappuccino,enquora/cappuccino,280north/cappuccino,rgv151/cappuccino,zittix/cappuccino,rgv151/cappuccino,cacaodev/cappuccino,tancred/cappuccino,krodelin/cappuccino,daboe01/cappuccino,tancred/cappuccino,AlexanderMazaletskiy/cappuccino,daboe01/cappuccino,daboe01/cappuccino,koamac/Cappuccino,kidaa/cappuccino,eventualbuddha/cappuccino,eventualbuddha/cappuccino,daboe01/cappuccino,FrankReh/cappuccino,deltaprojects/cappuccino,akshell/cappuccino,mrcarlberg/cappuccino,280north/cappuccino,Rosch/cappuccino,deltaprojects/cappuccino,daboe01/cappuccino,AlexanderMazaletskiy/cappuccino,primalmotion/cappuccino,primalmotion/cappuccino,akshell/cappuccino,AlexanderMazaletskiy/cappuccino,wangshijin/cappuccino,krodelin/cappuccino,primalmotion/cappuccino,tolmasky/cappuccino,cacaodev/cappuccino,cappuccino/cappuccino,Rosch/cappuccino,wangshijin/cappuccino,rgv151/cappuccino,enquora/cappuccino,zittix/cappuccino,dgvivero/CappCoreData,kidaa/cappuccino,dgvivero/CappCoreData,zittix/cappuccino,280north/cappuccino,280north/cappuccino,cacaodev/cappuccino,wangshijin/cappuccino,FrankReh/cappuccino,Dogild/cappuccino,krodelin/cappuccino,deltaprojects/cappuccino,mrcarlberg/cappuccino,primalmotion/cappuccino,cappuccino/cappuccino,primalmotion/cappuccino,koamac/Cappuccino,kidaa/cappuccino,rgv151/cappuccino,koamac/Cappuccino,tolmasky/cappuccino,mrcarlberg/cappuccino,zittix/cappuccino,Dogild/cappuccino,tolmasky/cappuccino,akshell/cappuccino,AlexanderMazaletskiy/cappuccino,wangshijin/cappuccino,koamac/Cappuccino,rgv151/cappuccino,primalmotion/cappuccino,tancred/cappuccino,AlexanderMazaletskiy/cappuccino,cappuccino/cappuccino,cappuccino/cappuccino,cacaodev/cappuccino,kidaa/cappuccino,rgv151/cappuccino,daboe01/cappuccino,deltaprojects/cappuccino,kidaa/cappuccino,mrcarlberg/cappuccino,zittix/cappuccino,Rosch/cappuccino,FrankReh/cappuccino,Dogild/cappuccino,akshell/cappuccino,zittix/cappuccino,dgvivero/CappCoreData,tolmasky/cappuccino,FrankReh/cappuccino