Ellipsization can't shorten 1-character string.

It doesn't make sense to attempt to shorten 1 character long string, so
don't do it. Note that 2 characters strings may be shortened (consider
e.g. "mm" in some typefaces).

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@66871 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/common/ctrlcmn.cpp

@@ -255,7 +255,7 @@ wxString wxControlBase::DoEllipsizeSingleLine(const wxString& curLine, const wxD
 
     wxArrayInt charOffsetsPx;
     size_t len = curLine.length();
-    if (len == 0 ||
+    if (len <= 1 ||
         !dc.GetPartialTextExtents(curLine, charOffsetsPx))
         return curLine;