comctl32/tests: Use SetRect() instead of open coding it.

dlls/comctl32/tests/animate.c

@@ -88,10 +88,7 @@ static void create_animate(DWORD parent_style, DWORD animate_style)
     wc.lpfnWndProc = animate_test_wnd_proc;
     RegisterClassA(&wc);
 
-    rect.left = 0;
-    rect.top = 0;
-    rect.right = 200;
-    rect.bottom = 200;
+    SetRect(&rect, 0, 0, 200, 200);
     ret = AdjustWindowRect(&rect, WS_OVERLAPPEDWINDOW, FALSE);
     ok(ret, "got %d\n", ret);
 

dlls/comctl32/tests/monthcal.c

@@ -1895,7 +1895,7 @@ static void test_MCM_SIZERECTTOMIN(void)
     ret = SendMessageA(hwnd, MCM_SIZERECTTOMIN, 0, 0);
     ok(ret == 0, "got %d\n", ret);
 
-    r.left = r.right = r.top = r.bottom = 0;
+    SetRectEmpty(&r);
     ret = SendMessageA(hwnd, MCM_SIZERECTTOMIN, 0, (LPARAM)&r);
     if (ret == 0)
     {

dlls/comctl32/tests/progress.c

@@ -124,10 +124,7 @@ static void init(void)
     wc.lpfnWndProc = progress_test_wnd_proc;
     RegisterClassA(&wc);
 
-    rect.left = 0;
-    rect.top = 0;
-    rect.right = 400;
-    rect.bottom = 20;
+    SetRect(&rect, 0, 0, 400, 20);
     ret = AdjustWindowRect(&rect, WS_OVERLAPPEDWINDOW, FALSE);
     ok(ret, "got %d\n", ret);