better error message
Update expression.d
Merge pull request #2 from UplinkCoder/better_error

Update assert message in expression.d
Merge pull request #1 from UplinkCoder/32

made error massage more meaningful
better assert messages
Merge pull request #3 from UplinkCoder/better_error

better assert messages
Fix missing ;
Merge remote-tracking branch 'origin/master' into 32

Conflicts:
	src/d/semantic/sizeof.d
FIXUP bitWidth to TypeKind