minor: missing return

ext/cbson/buffer.c

@@ -76,6 +76,7 @@ static int buffer_grow(buffer_t buffer, int min_length) {
         return 1;
     }
     buffer->size = size;
+    return 0;
 }
 
 /* Assure that `buffer` has at least `size` free bytes (and grow if needed).

ext/cbson/cbson.c

@@ -52,7 +52,6 @@
     if (buffer_write_at_position((buffer), (position), (data), (size)) != 0) \
         rb_raise(rb_eNoMemError, "failed to allocate memory in buffer.c")
 
-
 #define MAX_HOSTNAME_LENGTH 256
 
 static VALUE Binary;