* On 64-bit targets, handle abs(int64) internally, using the same code as for abs(longint), i.e. without branching.  Both generic and x86-specific pass 2 code is already suitable for different operand sizes, only type checking needs removal of excessive conversions to 32 bits.

git-svn-id: http://svn.freepascal.org/svn/fpc/trunk@27989 3ad0048d-3df7-0310-abae-a5850022a9f2