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-rw-r--r--libxcb/src/xcb_conn.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/libxcb/src/xcb_conn.c b/libxcb/src/xcb_conn.c
index 4a8f63bcf..0b080d4d4 100644
--- a/libxcb/src/xcb_conn.c
+++ b/libxcb/src/xcb_conn.c
@@ -78,8 +78,10 @@ size_t writev(int fildes, const struct iovec *iov, int iovcnt)
errno =WSAGetLastError();
if(errno == WSAEWOULDBLOCK)
errno = EAGAIN;
- assert(sum == 0);
- return r;
+ if (sum)
+ return sum;
+ else
+ return r;
}
p += r;
l -= r;