Removed some unnecessary string copies in LLTextBase and LLNormalTextSegment by changing getWText() to return const LLWString& (instead of LLWString), and storing the result in a const LLWString& instead of an LLWString in places where the string doesn't need to be modified.
Made LLTextViewModel::getDisplay() also return const LLWString& instead of LLWString.
Removed a couple of unused local string variables in LLTextBase (the compiler flagged these after converting the local copies to const LLWString&).
Monroe Linden