ENGINES: Silence clang warning about unused private member _vm

This affects the Console / debugger classes of multiple engines.
An alternative solution would have been to remove the unused _vm
member vars. However, it seems likely that in the future, the _vm
member could be useful for methods added to the console. So instead,
we add a simple assert(_vm) to silence the clang warning.

1 files changed, 1 insertions, 0 deletions

diff --git a/engines/toon/console.cpp b/engines/toon/console.cpp
index 8037dca4cb..18f81e1323 100644
--- a/engines/toon/console.cpp
+++ b/engines/toon/console.cpp
@@ -26,6 +26,7 @@
 namespace Toon {
 
 ToonConsole::ToonConsole(ToonEngine *vm) : GUI::Debugger(), _vm(vm) {
+	assert(_vm);
 }
 
 ToonConsole::~ToonConsole() {