libobs: Fix issue 4408 (hotkey logic)

If obs_core_hotkeys.strict_modifiers is true (new default),
hotkey is triggered only if current key modifiers exactly match
the hotkey definition. If false, legacy behavior is selected.

libobs/obs-hotkey.c

@@ -1194,9 +1194,10 @@ static inline bool modifiers_match(obs_hotkey_binding_t *binding,
 				   uint32_t modifiers_, bool strict_modifiers)
 {
 	uint32_t modifiers = binding->key.modifiers;
-	return !modifiers ||
-	       (!strict_modifiers && (modifiers & modifiers_) == modifiers) ||
-	       (strict_modifiers && modifiers == modifiers_);
+	if (!strict_modifiers)
+		return (modifiers & modifiers_) == modifiers;
+	else
+		return modifiers == modifiers_;
 }
 
 static inline bool is_pressed(obs_key_t key)
@@ -1243,7 +1244,7 @@ static inline void handle_binding(obs_hotkey_binding_t *binding,
 		modifiers_match(binding, modifiers, strict_modifiers);
 	bool modifiers_only = binding->key.key == OBS_KEY_NONE;
 
-	if (!binding->key.modifiers)
+	if (!strict_modifiers && !binding->key.modifiers)
 		binding->modifiers_match = true;
 
 	if (modifiers_only)

libobs/obs.c

@@ -990,6 +990,7 @@ static inline bool obs_init_hotkeys(void)
 			   NULL))
 		goto fail;
 
+	hotkeys->strict_modifiers = true;
 	hotkeys->hotkey_thread_initialized = true;
 
 	success = true;