Fix uninitlized variable

This bug may lead to incorrectly detect extra labels.

BUG=chromium:387571
TEST=tested on more machines manually

Change-Id: If834b7bd44a365814836b750657f125959f76a1d
Reviewed-on: https://chromium-review.googlesource.com/205211
Reviewed-by: Wu-Cheng Li <wuchengli@chromium.org>
Commit-Queue: Kuang-che Wu <kcwu@chromium.org>
Tested-by: Kuang-che Wu <kcwu@chromium.org>
diff --git a/util_vaapi.c b/util_vaapi.c
index 2a6de2e..7b439af 100644
--- a/util_vaapi.c
+++ b/util_vaapi.c
@@ -36,7 +36,7 @@
     VAProfile* required_profiles,
     VAEntrypoint entrypoint, unsigned int format) {
   int i;
-  bool found;
+  bool found = false;
   int num_supported_profiles;
   VAStatus va_res;
   VAProfile* profiles;