fix bug in Eof() which returned true even if we were only on the last line, not beyond it

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@38395 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/textbuf.h

@@ -106,7 +106,7 @@ public:
     // you're using "direct access" i.e. GetLine()
     size_t GetCurrentLine() const { return m_nCurLine; }
     void GoToLine(size_t n) { m_nCurLine = n; }
-    bool Eof() const { return (m_aLines.size() == 0 || m_nCurLine == m_aLines.size() - 1); }
+    bool Eof() const { return m_nCurLine == m_aLines.size(); }
 
     // these methods allow more "iterator-like" traversal of the list of
     // lines, i.e. you may write something like: