Rob Shearman : ole32: Fix the calculation of message_state-> prefix_data_len in two places where it would come out negative.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: 7a5d5c5503362349c21a515c6de4d7752d0c4d62
URL:    http://source.winehq.org/git/wine.git/?a=commit;h=7a5d5c5503362349c21a515c6de4d7752d0c4d62

Author: Rob Shearman <rob at codeweavers.com>
Date:   Tue Jan  2 18:08:49 2007 +0000

ole32: Fix the calculation of message_state->prefix_data_len in two places where it would come out negative.

---

 dlls/ole32/rpc.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/dlls/ole32/rpc.c b/dlls/ole32/rpc.c
index c52f6a3..c45e34e 100644
--- a/dlls/ole32/rpc.c
+++ b/dlls/ole32/rpc.c
@@ -856,7 +856,7 @@ static HRESULT WINAPI ClientRpcChannelBu
         if (FAILED(hr2))
             hr = hr2;
 
-        message_state->prefix_data_len = original_buffer - (char *)msg->Buffer;
+        message_state->prefix_data_len = (char *)msg->Buffer - original_buffer;
         msg->BufferLength -= message_state->prefix_data_len;
     }
     else
@@ -1237,7 +1237,7 @@ void RPC_ExecuteCall(struct dispatch_par
         goto exit;
     }
 
-    message_state->prefix_data_len = original_buffer - (char *)msg->Buffer;
+    message_state->prefix_data_len = (char *)msg->Buffer - original_buffer;
     message_state->binding_handle = msg->Handle;
 
     message_state->channel_hook_info.iid = params->iid;