datapath-windows: Remove setting of replyLen to zero.

This was one of the review comment which i forgot to address in
FLOW_DUMP checkin. We do not need to explicitly set replyLen to zero
 as caller would have already set it.

Signed-off-by: Ankur Sharma <ankursharma@vmware.com>
Acked-by: Nithin Raju <nithin@vmware.com>
Signed-off-by: Ben Pfaff <blp@nicira.com>

datapath-windows/ovsext/Flow.c

@@ -269,8 +269,6 @@ OvsFlowNlCmdHandler(POVS_USER_PARAMS_CONTEXT usrParamsCtx,
     RtlZeroMemory(&stats, sizeof(stats));
     RtlZeroMemory(&replyStats, sizeof(replyStats));
 
-    *replyLen = 0;
-
     if (!(usrParamsCtx->outputBuffer)) {
         /* No output buffer */
         rc = STATUS_INVALID_BUFFER_SIZE;
@@ -387,8 +385,6 @@ OvsFlowNlGetCmdHandler(POVS_USER_PARAMS_CONTEXT usrParamsCtx,
 
     NL_BUFFER nlBuf;
 
-    *replyLen = 0;
-
     if (!(usrParamsCtx->outputBuffer)) {
         /* No output buffer */
         rc = STATUS_INVALID_BUFFER_SIZE;
@@ -463,8 +459,6 @@ _FlowNlGetCmdHandler(POVS_USER_PARAMS_CONTEXT usrParamsCtx,
     UINT32 keyAttrOffset = 0;
     UINT32 tunnelKeyAttrOffset = 0;
 
-    *replyLen = 0;
-
     if (usrParamsCtx->inputLength > usrParamsCtx->outputLength) {
         /* Should not be the case.
          * We'll be copying the flow keys back from