[PATCH lib/libX11] Don't use caddr_t casts

[Jon TURNEY]

Casting a (const char *) to (caddr_t) to assign to iovec.io_base
seems pointless. caddr_t isn't used anywhere else in xcb or libX11

Removing this cast allows building on MinGW without patching.

Note: there's a warning about dropping constness here, but that's
going to be unfixable as long as xcb_writev() takes a non-const struct
iovec as a parameter.

Cc: Ryan Pavlik <rpavlik at iastate.edu>
Signed-off-by: Jon TURNEY <jon.turney at dronecode.org.uk>
---
 src/xcb_io.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/xcb_io.c b/src/xcb_io.c
index 0af47d8..9702d87 100644
--- a/src/xcb_io.c
+++ b/src/xcb_io.c
@@ -478,9 +478,9 @@ void _XSend(Display *dpy, const char *data, long size)
 
 	vec[0].iov_base = dpy->buffer;
 	vec[0].iov_len = dpy->bufptr - dpy->buffer;
-	vec[1].iov_base = (caddr_t) data;
+	vec[1].iov_base = data;
 	vec[1].iov_len = size;
-	vec[2].iov_base = (caddr_t) pad;
+	vec[2].iov_base = pad;
 	vec[2].iov_len = -size & 3;
 
 	for(ext = dpy->flushes; ext; ext = ext->next_flush)
-- 
1.7.9