SSAUpdater.h should forward declare LoadInst

[llvmbot]

Bugzilla Link	11371
Resolution	FIXED
Resolved on	Nov 14, 2011 11:23
Version	trunk
OS	All
Reporter	LLVM Bugzilla Contributor
CC	@d0k

Extended Description

LoadInst is used in function replaceLoadWithValue.

Happens in earlier versions as well.

[d0k]

added the forward decl in r144536.