Sync mplayer.eu.rc.txt after 3c79306a0eca973bcb72061531b680d0d185d809.

Missing string in 8608c253a918f63586d88d3ed7bb285924957163 reappeared here...
DSUtil: Replace inline assembler by a compiler intrinsic.

This commits works around AStyle being fool by the non-standard __asm keyword.
Fix some implicit int64 to int32 conversion.
custom_messages.iss: updated Chinese Simplified translation.
Remove unused code.
Update Changelog.txt.