Avoid using data() of std::vector in woff2_dec

woff2/woff2_dec.cc

@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 //
-// Library for converting TTF format font files to their WOFF2 versions.
+// Library for converting WOFF2 format font files to their TTF versions.
 
 #include "./woff2_dec.h"
 
@@ -883,7 +883,7 @@ bool ConvertWOFF2ToTTF(uint8_t* result, size_t result_length,
     }
     if (continue_valid) {
       transform_buf += transform_length;
-      if (transform_buf > uncompressed_buf.data() + uncompressed_buf.size()) {
+      if (transform_buf > &uncompressed_buf[0] + uncompressed_buf.size()) {
         return FONT_COMPRESSION_FAILURE();
       }
     }