Since OpenThemeData() should return 0 in case theming is disabled

dlls/comctl32/header.c

@@ -1320,7 +1320,6 @@ HEADER_Create (HWND hwnd, WPARAM wParam, LPARAM lParam)
     TEXTMETRICW tm;
     HFONT hOldFont;
     HDC   hdc;
-    BOOL themingActive = IsAppThemed() && IsThemeActive();
 
     infoPtr = (HEADER_INFO *)Alloc (sizeof(HEADER_INFO));
     SetWindowLongPtrW (hwnd, 0, (DWORD_PTR)infoPtr);
@@ -1350,7 +1349,7 @@ HEADER_Create (HWND hwnd, WPARAM wParam, LPARAM lParam)
     SelectObject (hdc, hOldFont);
     ReleaseDC (0, hdc);
 
-    if (themingActive) OpenThemeData(hwnd, themeClass);
+    OpenThemeData(hwnd, themeClass);
 
     return 0;
 }

dlls/comctl32/listview.c

@@ -7516,7 +7516,6 @@ static LRESULT LISTVIEW_Create(HWND hwnd, const CREATESTRUCTW *lpcs)
   LISTVIEW_INFO *infoPtr;
   UINT uView = lpcs->style & LVS_TYPEMASK;
   LOGFONTW logFont;
-  BOOL themingActive = IsAppThemed() && IsThemeActive();
 
   TRACE("(lpcs=%p)\n", lpcs);
 
@@ -7599,7 +7598,7 @@ static LRESULT LISTVIEW_Create(HWND hwnd, const CREATESTRUCTW *lpcs)
     }
   }
 
-  if (themingActive) OpenThemeData(hwnd, themeClass);
+  OpenThemeData(hwnd, themeClass);
 
   return 0;