Issue #23619: Ensure C variable is initialized before using it.

The garbage in _crtInstalledToken was causing the IsCrtInstalled() function to return TRUE without actually checking anything. We now initialize the variable first.

Tools/msi/bundle/bootstrap/PythonBootstrapperApplication.cpp

@@ -2574,6 +2574,7 @@ public:
             }
         }
 
+        _crtInstalledToken = -1;
         pEngine->SetVariableNumeric(L"CRTInstalled", IsCrtInstalled() ? 1 : 0);
 
         _wixLoc = nullptr;
@@ -2603,8 +2604,6 @@ public:
         _suppressRepair = FALSE;
         _modifying = FALSE;
 
-        _crtInstalledToken = -1;
-
         _overridableVariables = nullptr;
         _taskbarList = nullptr;
         _taskbarButtonCreatedMessage = UINT_MAX;