initialize m_nCurLine in wxTextBuffer ctor (part of patch 1908134)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_2_8_BRANCH@52531 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/textbuf.h

@@ -172,7 +172,7 @@ protected:
     // -----
 
     // default ctor, use Open(string)
-    wxTextBuffer() { m_isOpened = false; }
+    wxTextBuffer() { m_nCurLine = 0; m_isOpened = false; }
 
     // ctor from filename
     wxTextBuffer(const wxString& strBufferName);