Untested, needs review

Fixes: CID1591856 Resource leak
Fixes: CID1591887 Resource leak
Fixes: CID1591874 Resource leak

Sponsored-by: Sovereign Tech Fund
Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc>
---
 libavdevice/dshow_capture.h | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/libavdevice/dshow_capture.h b/libavdevice/dshow_capture.h
index 81e684b9be3..bb39d4947aa 100644
--- a/libavdevice/dshow_capture.h
+++ b/libavdevice/dshow_capture.h
@@ -124,14 +124,15 @@ void ff_dshow_##prefix##_Destroy(class *this)             
                   \
 class *ff_dshow_##prefix##_Create(__VA_ARGS__)                               \
 {                                                                            \
     class *this = CoTaskMemAlloc(sizeof(class));                             \
-    void  *vtbl = CoTaskMemAlloc(sizeof(*this->vtbl));                       \
     dshowdebug("ff_dshow_"AV_STRINGIFY(prefix)"_Create(%p)\n", this);        \
-    if (!this || !vtbl)                                                      \
+    if (!this)                                                               \
         goto fail;                                                           \
     ZeroMemory(this, sizeof(class));                                         \
-    ZeroMemory(vtbl, sizeof(*this->vtbl));                                   \
+    this->vtbl = CoTaskMemAlloc(sizeof(*this->vtbl));                        \
+    if (!this->vtbl)                                                         \
+        goto fail;                                                           \
+    ZeroMemory(this->vtbl, sizeof(*this->vtbl));                             \
     this->ref  = 1;                                                          \
-    this->vtbl = vtbl;                                                       \
     if (!setup)                                                              \
         goto fail;                                                           \
     dshowdebug("created ff_dshow_"AV_STRINGIFY(prefix)" %p\n", this);        \
-- 
2.45.2

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