remove double semicolons

Signed-off-by: Dong Xu Wang <wdongxu@linux.vnet.ibm.com>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
diff --git a/qga/channel-win32.c b/qga/channel-win32.c
index 7ed98d7..8a303f3 100644
--- a/qga/channel-win32.c
+++ b/qga/channel-win32.c
@@ -268,7 +268,7 @@
 
 GIOStatus ga_channel_write_all(GAChannel *c, const char *buf, size_t size)
 {
-    GIOStatus status = G_IO_STATUS_NORMAL;;
+    GIOStatus status = G_IO_STATUS_NORMAL;
     size_t count;
 
     while (size) {