[PATCH] libavutil: fix memory leak of drmVersion

[Tim Blechmann]

address sanitizer showed some leaks of drmVersion structs.
`vaapi_device_create` did not call drmFreeVersion in all possible code
paths.

Signed-off-by: Tim Blechmann <tim.blechmann at qt.io>
---
  libavutil/hwcontext_vaapi.c | 3 +++
  1 file changed, 3 insertions(+)

diff --git a/libavutil/hwcontext_vaapi.c b/libavutil/hwcontext_vaapi.c
index 95aa38d9d2..92b704891e 100644
--- a/libavutil/hwcontext_vaapi.c
+++ b/libavutil/hwcontext_vaapi.c
@@ -1810,30 +1810,33 @@ static int vaapi_device_create(AVHWDeviceContext *ctx, const char *device,
                      char drm_vendor[8];
                      if (drmGetDevice(priv->drm_fd, &device)) {
                          av_log(ctx, AV_LOG_VERBOSE,
                                 "Failed to get DRM device info for device %d.\n", n);
                          close(priv->drm_fd);
                          priv->drm_fd = -1;
+                        drmFreeVersion(info);
                          continue;
                      }
                       snprintf(drm_vendor, sizeof(drm_vendor), "0x%x", 
device->deviceinfo.pci->vendor_id);
                      if (strcmp(vendor_id->value, drm_vendor)) {
                          av_log(ctx, AV_LOG_VERBOSE, "Ignoring device %d "
                                 "with non-matching vendor id (%s).\n",
                                 n, vendor_id->value);
                          drmFreeDevice(&device);
                          close(priv->drm_fd);
                          priv->drm_fd = -1;
+                        drmFreeVersion(info);
                          continue;
                      }
                      av_log(ctx, AV_LOG_VERBOSE, "Trying to use "
                             "DRM render node for device %d, "
                             "with matching vendor id (%s).\n",
                             n, vendor_id->value);
                      drmFreeDevice(&device);
+                    drmFreeVersion(info);
                      break;
                  }
                  drmFreeVersion(info);
  #endif
                  av_log(ctx, AV_LOG_VERBOSE, "Trying to use "
                         "DRM render node for device %d.\n", n);
-- 
2.48.1