Don't crash in wxGridCellAutoWrapStringRenderer when the column is hidden.

Our methods should arguably not be called at all in this case, but if this
does happen, at least don't crash.

Closes #15464.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@74750 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/generic/gridctrl.cpp

@@ -301,6 +301,11 @@ wxGridCellAutoWrapStringRenderer::GetTextLines(wxGrid& grid,
     const wxArrayString
         logicalLines = wxSplit(grid.GetCellValue(row, col), '\n', '\0');
 
+    // Trying to do anything if the column is hidden anyhow doesn't make sense
+    // and we run into problems in BreakLine() in this case.
+    if ( maxWidth <= 0 )
+        return logicalLines;
+
     wxArrayString physicalLines;
     for ( wxArrayString::const_iterator it = logicalLines.begin();
           it != logicalLines.end();