[PATCH 2/2] win32u: Use get_dc_obj() in GetDCHook() and SetDCHook().

[Paul Gofman]

Signed-off-by: Paul Gofman 
---
     The failing case is similar to the previous patch but now getting GL drawable in
     winex11.drv faile due to WindowFromDC() fails through GetDCHook() which can't
     get_dc_ptr() on the context.
     Also, SetHookFlags() is already using get_dc_obj() so maybe doing the same
     in SetDCHook() and GetDCHook() makes sense regardless.

dlls/win32u/dc.c | 18 ++++++++++++++----
 1 file changed, 14 insertions(+), 4 deletions(-)

diff --git a/dlls/win32u/dc.c b/dlls/win32u/dc.c
index 9c09bf66e03..cb38c4161ee 100644
--- a/dlls/win32u/dc.c
+++ b/dlls/win32u/dc.c
@@ -1007,13 +1007,18 @@ BOOL WINAPI NtGdiGetTransform( HDC hdc, DWORD which, XFORM *xform )
  */
 BOOL WINAPI SetDCHook( HDC hdc, DCHOOKPROC hookProc, DWORD_PTR dwHookData )
 {
-    DC *dc = get_dc_ptr( hdc );
+    DC *dc = get_dc_obj( hdc );

if (!dc) return FALSE;
+    if (dc->attr->disabled)
+    {
+        GDI_ReleaseObj( hdc );
+        return 0;
+    }

dc->dwHookData = dwHookData;
     dc->hookProc = hookProc;
-    release_dc_ptr( dc );
+    GDI_ReleaseObj( hdc );
     return TRUE;
 }

@@ -1025,13 +1030,18 @@ BOOL WINAPI SetDCHook( HDC hdc, DCHOOKPROC hookProc, DWORD_PTR dwHookData )
  */
 DWORD_PTR WINAPI GetDCHook( HDC hdc, DCHOOKPROC *proc )
 {
-    DC *dc = get_dc_ptr( hdc );
+    DC *dc = get_dc_obj( hdc );
     DWORD_PTR ret;

if (!dc) return 0;
+    if (dc->attr->disabled)
+    {
+        GDI_ReleaseObj( hdc );
+        return 0;
+    }
     if (proc) *proc = dc->hookProc;
     ret = dc->dwHookData;
-    release_dc_ptr( dc );
+    GDI_ReleaseObj( hdc );
     return ret;
 }