Auto added missing args

examples/sound/fade_in_out/fade_in_out.collection

@@ -98,6 +98,8 @@ embedded_instances {
   "looping: 1\\n"
   "group: \\\"master\\\"\\n"
   "gain: 1.0\\n"
+  "pan: 0.0\\n"
+  "speed: 1.0\\n"
   "\"\n"
   "  position {\n"
   "    x: 0.0\n"

examples/sound/music/music.collection

@@ -98,6 +98,8 @@ embedded_instances {
   "looping: 1\\n"
   "group: \\\"master\\\"\\n"
   "gain: 1.0\\n"
+  "pan: 0.0\\n"
+  "speed: 1.0\\n"
   "\"\n"
   "  position {\n"
   "    x: 0.0\n"