#i123840# fix narrowing conversions in CoreGraphic's array initializers

C++11 says that narrowing conversions in array initializers are illegal.
This often happened for signed/unsigned and 32bit/64bit mismatches when
initializing CoreGraphics elementary types. Using CoreGraphic helper
methods for primitives solves these problems and is recommended anyway.
#i123840# fix a 64->32bit narrowing conversion in nss/ciphercontext.cxx
#i123840# fix narrowing conversions when initializing SC's szMSFilterNames array