detect/file-data: Apply transforms on file_data

This commit cause transforms to be applied on the sticky buffer.

src/detect-file-data.c

@@ -1,4 +1,4 @@
-/* Copyright (C) 2007-2018 Open Information Security Foundation
+/* Copyright (C) 2007-2020 Open Information Security Foundation
  *
  * You can copy, redistribute or modify this Program under the terms of
  * the GNU General Public License version 2 as published by the Free
@@ -334,6 +334,8 @@ static InspectionBuffer *HttpServerBodyGetDataCallback(DetectEngineThreadCtx *de
         }
     }
 
+    InspectionBufferApplyTransforms(buffer, transforms);
+
     /* move inspected tracker to end of the data. HtpBodyPrune will consider
      * the window sizes when freeing data */
     body->body_inspected = body->content_len_so_far;