DNG: Fix OpcodeList2 length field.

Bug: 15432434
Change-Id: I2a0e017f72c31cdbd30df1fdb32cdd5ff4af3649
diff --git a/media/img_utils/src/DngUtils.cpp b/media/img_utils/src/DngUtils.cpp
index 788dfc8..14b31ec 100644
--- a/media/img_utils/src/DngUtils.cpp
+++ b/media/img_utils/src/DngUtils.cpp
@@ -19,7 +19,7 @@
 namespace android {
 namespace img_utils {
 
-OpcodeListBuilder::OpcodeListBuilder() : mOpList(), mEndianOut(&mOpList, BIG) {
+OpcodeListBuilder::OpcodeListBuilder() : mCount(0), mOpList(), mEndianOut(&mOpList, BIG) {
     if(mEndianOut.open() != OK) {
         ALOGE("%s: Open failed.", __FUNCTION__);
     }