fix: Prevent crash when unknown module referenced in INI

[sentry]

Addresses CLIENT-317: "ThingTemplate::parseModuleName".

This change prevents a crash that occurred when an INI file referenced an unknown or unregistered module name. The TheModuleFactory->newModuleDataFromINI() function would return a nullptr for such cases, which was then immediately dereferenced by data->isAiModuleData() without a null check, leading to an access violation.

A null check has been added for the data pointer after the call to newModuleDataFromINI(). If data is null, a DEBUG_CRASH is triggered, and INI_INVALID_DATA is thrown, providing a graceful error handling mechanism instead of a hard crash.

This fix has been applied in:

• Generals/Code/GameEngine/Source/Common/Thing/ThingTemplate.cpp
• GeneralsMD/Code/GameEngine/Source/Common/Thing/ThingTemplate.cpp

Fixes CLIENT-317

_{This PR was automatically generated by Sentry. You can adjust this setting at any time.}