Move sprintf to snprintf.

Bug: 19340053
Change-Id: Id0d866e6195ed4752b4be6081eeb2aab8b1dbe9a
diff --git a/init/init.cpp b/init/init.cpp
index 8647496..41ceb0a 100644
--- a/init/init.cpp
+++ b/init/init.cpp
@@ -252,7 +252,7 @@
         umask(077);
         if (properties_inited()) {
             get_property_workspace(&fd, &sz);
-            sprintf(tmp, "%d,%d", dup(fd), sz);
+            snprintf(tmp, sizeof(tmp), "%d,%d", dup(fd), sz);
             add_environment("ANDROID_PROPERTY_WORKSPACE", tmp);
         }