fix(zscript): global var initializers not erroring when non-constant

src/parser/RegistrationVisitor.cpp

@@ -833,7 +833,7 @@ void RegistrationVisitor::caseVarInitializer(ASTExprVarInitializer& host, void*
 		if(host.valueIsArray(scope, this)) doRegister(host);
 		else
 		{
-			host.value = host.content->getCompileTimeValue(this, scope).value_or(0L); // sometimes has no value
+			host.value = host.content->getCompileTimeValue(this, scope);
 			if(host.value) doRegister(host);
 		}
 	}