wxGUI: Fixes UTM hemisphere selection in location wizard

[saket0187]

Fixes #5467

Problem Description

When creating a UTM location using "Define custom CRS" method and selecting "No" for "Southern Hemisphere?", the wizard incorrectly adds the +south parameter to the PROJ.4 definition, resulting in a southern hemisphere projection instead of northern.

Root Cause

Line 905 in gui/wxpython/location_wizard/wizard.py:
if param["value"] is False:

The code used is False to check the parameter value, but wx.Choice widget returns integer 0 for "No" selection, not boolean False. The is operator checks object identity, not value equality, so the condition fails and the +south parameter gets added incorrectly.

Solution

Changed the condition to:
if param["value"] == 0 or param["value"] is False:

Testing

• Compiled and tested on WSL Ubuntu 24.04
• Verified fix with both original buggy code and patched version

Before Fix

After Fix