Fixed a bug where right clicking and opening the object profile floater for...

Fixed a bug where right clicking and opening the object profile floater for the first time doesn't update the creator and owner names. This is due to the line editors having something like 'TestString IgnorePlease' as their initial value instead of a null string.

indra/newview/llsidepaneltaskinfo.cpp

@@ -125,9 +125,11 @@ BOOL LLSidepanelTaskInfo::postBuild()
 
 	mCreatorNameLabel = getChild<LLTextBox>("CreatorNameLabel");
 	mCreatorNameEditor = getChild<LLTextBox>("Creator Name");
+	mCreatorNameEditor->setValue(LLStringUtil::null);
 
 	mOwnerNameLabel = getChild<LLTextBox>("Owner:");
 	mOwnerNameEditor = getChild<LLTextBox>("Owner Name");
+	mOwnerNameEditor->setValue(LLStringUtil::null);
 
 	mGroupNameLabel = getChild<LLTextBox>("Group_label");
 	mGroupSetButton = getChild<LLButton>("button set group");