Fix uninitialized value in sfntly

Bug: 116114182
Test: build
Change-Id: Ief84dd8a19bdb461945e07504270be76a3545701
Merged-In: Ief84dd8a19bdb461945e07504270be76a3545701
(cherry picked from commit 51ecc82faa63aacdde6648f80a3898b53653da78)

README.android

diff --git a/README.android b/README.android
index 4447b27..39b0cf9 100644
--- a/README.android
+++ b/README.android
@@ -9,3 +9,7 @@
 git rm -rf cpp/ext
 git rm -rf cpp/tools
 git commit
+
+
+# Local changes
+Fixed uninitialized variable. See bug 116114182 for details.

cpp/src/sfntly/port/file_input_stream.cc

diff --git a/cpp/src/sfntly/port/file_input_stream.cc b/cpp/src/sfntly/port/file_input_stream.cc
index dfe9a7b..883c1fd 100644
--- a/cpp/src/sfntly/port/file_input_stream.cc
+++ b/cpp/src/sfntly/port/file_input_stream.cc
@@ -70,7 +70,7 @@
 #endif
     return 0;
   }
-  byte_t value;
+  byte_t value = 0;
   size_t length = fread(&value, 1, 1, file_);
   position_ += length;
   return value;