initStackMemory: remove isStackInitialized check from Emulator.read/writeMemory().
initStackMemory: remove isStackInitialized check from Emulator.read/writeMemory().

instead, if the stack is resized, smash the new stack map memory right above the default stack map. does not support resizing the stack smaller.

also, optimize initializiation of stack memory

pwns4cash/vivisect,vivisect/vivisect,bat-serjo/vivisect,HackerTool/vivisect,imjonsnooow/vivisect,joshuahoman/vivisect,cmaruti/vivisect,cmaruti/vivisect,bat-serjo/vivisect,atlas0fd00m/vivisect,bat-serjo/vivisect,cmaruti/vivisect,pwns4cash/vivisect,HackerTool/vivisect,pwns4cash/vivisect,imjonsnooow/vivisect,atlas0fd00m/vivisect,vivisect/vivisect,joshuahoman/vivisect,HackerTool/vivisect,atlas0fd00m/vivisect,imjonsnooow/vivisect,vivisect/vivisect,joshuahoman/vivisect