Fix hypothetical double-own in hidl_vec.

To my knowledge, no one has hit this, but this type (probably unwisely)
allows itself to be empty w/ null buffer or empty w/ non-null buffer
(e.g. via setExternal/resize(0)). So, releaseData should be checking for
null buffer, not size 0.

Bug: 152911913
Test: libhidl_test
Change-Id: I5792b5aac5b3278333a75ff84f09d3d5e5b3a8a2

1 files changed, 1 insertions, 1 deletions

diff --git a/base/include/hidl/HidlSupport.h b/base/include/hidl/HidlSupport.h
index 9343f0f..0a0beeb 100644
--- a/base/include/hidl/HidlSupport.h
+++ b/base/include/hidl/HidlSupport.h
@@ -412,7 +412,7 @@ struct hidl_vec {
     }
 
     T *releaseData() {
-        if (!mOwnsBuffer && mSize > 0) {
+        if (!mOwnsBuffer && mBuffer != nullptr) {
             resize(mSize);
         }
         mOwnsBuffer = false;