stream: enforce gap earlier in app reassembly

src/stream-tcp-reassemble.c

@@ -1039,6 +1039,10 @@ int StreamTcpReassembleAppLayer (ThreadVars *tv, TcpReassemblyThreadCtx *ra_ctx,
         SCLogDebug("stream no reassembly flag set or app-layer disabled.");
         SCReturnInt(0);
     }
+    if (stream->flags & STREAMTCP_STREAM_FLAG_GAP) {
+        SCReturnInt(0);
+    }
+
 
     SCLogDebug("stream->seg_list %p", stream->seg_list);
 #ifdef DEBUG
@@ -1123,10 +1127,6 @@ int StreamTcpReassembleAppLayer (ThreadVars *tv, TcpReassemblyThreadCtx *ra_ctx,
         SCReturnInt(0);
     }
 
-    if (stream->flags & STREAMTCP_STREAM_FLAG_GAP) {
-        SCReturnInt(0);
-    }
-
     /* with all that out of the way, lets update the app-layer */
     return ReassembleUpdateAppLayer(tv, ra_ctx, ssn, stream, p, dir);
 }