Fix segfault in wxUIntProperty calling wxString::Format with wrong fmt

[jrl1]

wxUIntProperty::ValueToString() does not take into account that long can be 32 or 64 bits and so it needs to use a different wxString::Format() depending on the sizeof(long).

Without this patch wxUIntProperties segfault and are unusable on 64 bit linux w/ gcc.

The one line patch was made using this command in the root wxWidgets checkout dir.
$svn diff > wxuintproperty_string_format_patch.patch

[jrl1]

svn diff > a.patch in root wxWidgets dir.

[vadz]

I don't believe this patch is correct, or at least its explanation isn't. On 64 bit systems using "%ld" (or "%lu", "%lx" &c) is absolutely the right thing to do for long values and printing them should work regardless of the exact size.

So what exactly is the problem and why does it crash?

[jrl1]

I didn't notice that you had fixed the problem elsewhere since the code around my fix looked the same when I pasted my fix back in to make the patch.

 http://svn.wxwidgets.org/viewvc/wx/wxWidgets/trunk/src/propgrid/props.cpp?view=log

 http://svn.wxwidgets.org/viewvc/wx/wxWidgets/trunk/src/propgrid/props.cpp?r1=66728&r2=69113

Sorry about the trouble.