dinput/tests: Remove unrequired pointer checks (Coverity).

dlls/dinput/tests/device.c

@@ -190,15 +190,15 @@ static BOOL CALLBACK enum_devices(const DIDEVICEINSTANCEA *lpddi, void *pvRef)
         trace("Testing device %p \"%s\"\n", device, lpddi->tszInstanceName);
 
         hr = IUnknown_QueryInterface(device, &IID_IDirectInputDevice2A, (LPVOID*)&obj);
-        ok(SUCCEEDED(hr), "IUnknown_QueryInterface(IID_IDirectInputDevice7A) failed: %08x\n", hr);
+        ok(SUCCEEDED(hr), "IUnknown_QueryInterface(IID_IDirectInputDevice2A) failed: %08x\n", hr);
         test_object_info(obj, data->hwnd);
-        if (obj) IUnknown_Release(obj);
+        IUnknown_Release(obj);
         obj = NULL;
 
         hr = IUnknown_QueryInterface(device, &IID_IDirectInputDevice2W, (LPVOID*)&obj);
-        ok(SUCCEEDED(hr), "IUnknown_QueryInterface(IID_IDirectInputDevice7W) failed: %08x\n", hr);
+        ok(SUCCEEDED(hr), "IUnknown_QueryInterface(IID_IDirectInputDevice2W) failed: %08x\n", hr);
         test_object_info(obj, data->hwnd);
-        if (obj) IUnknown_Release(obj);
+        IUnknown_Release(obj);
 
         IUnknown_Release(device);
     }

dlls/dinput/tests/keyboard.c

@@ -182,7 +182,7 @@ static void acquire_tests(IDirectInputA *pDI, HWND hwnd)
     hr = IDirectInputDevice_Unacquire(pKeyboard);
     ok(SUCCEEDED(hr), "IDirectInputDevice_Unacquire() failed: %08x\n", hr);
 
-    if (pKeyboard) IUnknown_Release(pKeyboard);
+    IUnknown_Release(pKeyboard);
 
     ActivateKeyboardLayout(hkl_orig, 0);
     UnloadKeyboardLayout(hkl);
@@ -272,7 +272,7 @@ static void test_get_prop(IDirectInputA *pDI, HWND hwnd)
     hr = IDirectInputDevice_GetProperty(pKeyboard, DIPROP_RANGE, &diprg.diph);
     ok(hr == DIERR_UNSUPPORTED, "IDirectInputDevice_GetProperty() did not return DIPROP_RANGE but: %08x\n", hr);
 
-    if (pKeyboard) IUnknown_Release(pKeyboard);
+    IUnknown_Release(pKeyboard);
 }
 
 static void test_capabilities(IDirectInputA *pDI, HWND hwnd)

dlls/dinput/tests/mouse.c

@@ -198,7 +198,7 @@ static void test_acquire(IDirectInputA *pDI, HWND hwnd)
     /* Granularity of Y axis should be 1! */
     ok(hr == S_OK && di_op.dwData == 1, "GetProperty(): %08x, dwData: %i but should be 1.\n", hr, di_op.dwData);
 
-    if (pMouse) IUnknown_Release(pMouse);
+    IUnknown_Release(pMouse);
 
     DestroyWindow( hwnd2 );
 }
@@ -259,7 +259,7 @@ static void test_mouse_EnumObjects(IDirectInputA *pDI)
     hr = IDirectInputDevice_EnumObjects(pMouse, EnumAxes, NULL, DIDFT_ALL);
     ok(hr==DI_OK,"IDirectInputDevice_EnumObjects() failed: %08x\n", hr);
 
-    if (pMouse) IUnknown_Release(pMouse);
+    IUnknown_Release(pMouse);
 }
 
 static void mouse_tests(void)