am 7d4893b9: Merge "Add missing include."

* commit '7d4893b96349d86c414f16eb1a2ff21aa93143ca':
  Add missing include.
diff --git a/keystore-engine/keyhandle.cpp b/keystore-engine/keyhandle.cpp
index 1799735..aeba896 100644
--- a/keystore-engine/keyhandle.cpp
+++ b/keystore-engine/keyhandle.cpp
@@ -25,6 +25,8 @@
 
 #include <openssl/engine.h>
 
+#include <string.h>
+
 /**
  * Makes sure the ex_data for the keyhandle is initially set to NULL.
  */