Avoid unused variable warning in wxUSE_DATAOBJ==0 build.

Declare variable only used when wxUSE_DATAOBJ==1 inside the check for it.

Closes #16434.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@77460 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/stc/ScintillaWX.cpp

@@ -499,11 +499,11 @@ void ScintillaWX::Copy() {
 void ScintillaWX::Paste() {
     pdoc->BeginUndoAction();
     ClearSelection(multiPasteMode == SC_MULTIPASTE_EACH);
-    bool isRectangularClipboard = false;
 
 #if wxUSE_DATAOBJ
     wxTextDataObject data;
     bool gotData = false;
+    bool isRectangularClipboard = false;
 
     wxTheClipboard->UsePrimarySelection(false);
     if (wxTheClipboard->Open()) {