CPPageExternalFilters: fix wrong popup point check

Casting UINT to int and then comparing it to 0 is just wrong
Profile: fix inability to open locked mpc-hc.ini

I previously misjudged c++ semantics pretty badly here
typo
cosmetics
VSFilter: move the AboutDlg version to a new define and use that
AboutDlg.cpp: use the MPC_VERSION_ARCH define
Reduce variable scope.
remove unneeded variable
update icl13.diff