Fix CSSLength not setting proper unit type

nel/src/gui/css_length.cpp

@@ -69,7 +69,11 @@ bool CSSLength::parseValue(const std::string &value, bool allowPercent, bool all
 	if (knownUnits.count(unit))
 	{
 		std::string tmpstr = value.substr(0, pos);
-		return fromString(tmpstr, m_Value);
+		if (fromString(tmpstr, m_Value))
+		{
+			setUnit(unit);
+			return true;
+		}
 	}
 
 	return false;