Correctly handle mouse leaving the window

Source/diablo.cpp

@@ -1360,8 +1360,6 @@ void DisableInputWndProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
 		sgbMouseDown = CLICK_NONE;
 		return;
 	case DVL_WM_CAPTURECHANGED:
-		if (hWnd == (HWND)lParam)
-			return;
 		sgbMouseDown = CLICK_NONE;
 		return;
 	}
@@ -1425,10 +1423,8 @@ void GM_Game(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
 		}
 		return;
 	case DVL_WM_CAPTURECHANGED:
-		if (hWnd != (HWND)lParam) {
-			sgbMouseDown = CLICK_NONE;
-			track_repeat_walk(FALSE);
-		}
+		sgbMouseDown = CLICK_NONE;
+		track_repeat_walk(FALSE);
 		break;
 	case WM_DIABNEXTLVL:
 	case WM_DIABPREVLVL:

SourceX/miniwin/misc_msg.cpp

@@ -537,13 +537,15 @@ bool PeekMessage(LPMSG lpMsg)
 		case SDL_WINDOWEVENT_EXPOSED:
 			lpMsg->message = DVL_WM_PAINT;
 			break;
+		case SDL_WINDOWEVENT_LEAVE:
+			lpMsg->message = DVL_WM_CAPTURECHANGED;
+			break;
 		case SDL_WINDOWEVENT_MOVED:
 		case SDL_WINDOWEVENT_RESIZED:
 		case SDL_WINDOWEVENT_SIZE_CHANGED:
 		case SDL_WINDOWEVENT_MINIMIZED:
 		case SDL_WINDOWEVENT_MAXIMIZED:
 		case SDL_WINDOWEVENT_RESTORED:
-		case SDL_WINDOWEVENT_LEAVE:
 		case SDL_WINDOWEVENT_FOCUS_GAINED:
 		case SDL_WINDOWEVENT_FOCUS_LOST:
 #if SDL_VERSION_ATLEAST(2, 0, 5)