user32: Clamp newly created windows to the minimum window size.

dlls/user32/tests/msg.c

@@ -3374,7 +3374,7 @@ static void test_mdi_messages(void)
                                 0, 0, CW_USEDEFAULT, CW_USEDEFAULT,
                                 mdi_client, 0, GetModuleHandleA(0), NULL);
     assert(mdi_child2);
-    ok_sequence(WmCreateMDIchildInvisibleMaxSeq4, "Create maximized invisible MDI child window", TRUE);
+    ok_sequence(WmCreateMDIchildInvisibleMaxSeq4, "Create maximized invisible MDI child window", FALSE);
     ok(IsZoomed(mdi_child2), "MDI child should be maximized\n");
     ok(!(GetWindowLongA(mdi_child2, GWL_STYLE) & WS_VISIBLE), "MDI child should be not visible\n");
     ok(!IsWindowVisible(mdi_child2), "MDI child should be not visible\n");
@@ -4577,10 +4577,10 @@ static void test_setwindowpos(void)
                            NULL, NULL, 0);
 
     GetWindowRect(hwnd, &rc);
-    todo_wine expect(sysX, rc.right);
+    expect(sysX, rc.right);
     expect(winY, rc.bottom);
     GetClientRect(hwnd, &rc);
-    todo_wine expect(sysX - 6, rc.right);
+    expect(sysX - 6, rc.right);
     expect(winY - 25, rc.bottom);
 
     flush_events();

dlls/user32/win.c

@@ -1165,6 +1165,8 @@ static HWND WIN_CreateWindowEx( CREATESTRUCTA *cs, LPCWSTR className, UINT flags
         WINPOS_GetMinMaxInfo( hwnd, &maxSize, &maxPos, &minTrack, &maxTrack);
         if (maxTrack.x < cx) cx = maxTrack.x;
         if (maxTrack.y < cy) cy = maxTrack.y;
+        if (minTrack.x > cx) cx = minTrack.x;
+        if (minTrack.y > cy) cy = minTrack.y;
     }
 
     if (cx < 0) cx = 0;