[#746] Fix PMatrixStack.load()/.peek() and split size()
[#746] Fix PMatrixStack.load()/.peek() and split size()

kevinb7/processing-js,corbanbrook/processing-js,guazipi/processing-js,jeresig/processing-js,kevinb7/processing-js,jaredly/processing-js,guazipi/processing-js,baiyanghese/processing-js,jeresig/processing-js,corbanbrook/processing-js,baiyanghese/processing-js,jaredly/processing-js,corbanbrook/processing-js