Fix warnings, re-enable -Werror.

Change-Id: Ic6b1a10f46f980f9a9d8d130600419a792703c44
diff --git a/media/img_utils/src/TiffEntryImpl.cpp b/media/img_utils/src/TiffEntryImpl.cpp
index 2052ceb..6efa458 100644
--- a/media/img_utils/src/TiffEntryImpl.cpp
+++ b/media/img_utils/src/TiffEntryImpl.cpp
@@ -23,7 +23,7 @@
 namespace img_utils {
 
 template<>
-uint32_t TiffEntryImpl<TiffIfd>::getSize() const {
+size_t TiffEntryImpl<TiffIfd>::getSize() const {
     uint32_t total = 0;
     for (uint32_t i = 0; i < mCount; ++i) {
         total += mData[i].getSize();