[PATCH libXi] Fix const compiler warnings

[Javier Pello]

When invoking Data, Data16 and Data32 from XChangeDeviceProperty,
we must cast the data pointer to the right type, but we do not need
to cast constness away. This change allows to enable -Wcast-qual on
the build and have it complete without warnings.

Signed-off-by: Javier Pello <javier.pello at urjc.es>
---
 src/XChDProp.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/XChDProp.c b/src/XChDProp.c
index c863cdbd..45d0ee4e 100644
--- a/src/XChDProp.c
+++ b/src/XChDProp.c
@@ -74,7 +74,7 @@ XChangeDeviceProperty(Display* dpy, XDevice* dev,
 	len = ((long)nelements + 3) >> 2;
 	if (dpy->bigreq_size || req->length + len <= (unsigned) 65535) {
 	    SetReqLen(req, len, len);
-	    Data (dpy, (char *)data, nelements);
+	    Data (dpy, (_Xconst char *)data, nelements);
 	} /* else force BadLength */
 	break;
 
@@ -83,7 +83,7 @@ XChangeDeviceProperty(Display* dpy, XDevice* dev,
 	if (dpy->bigreq_size || req->length + len <= (unsigned) 65535) {
 	    SetReqLen(req, len, len);
 	    len = (long)nelements << 1;
-	    Data16 (dpy, (short *) data, len);
+	    Data16 (dpy, (_Xconst short *) data, len);
 	} /* else force BadLength */
 	break;
 
@@ -92,7 +92,7 @@ XChangeDeviceProperty(Display* dpy, XDevice* dev,
 	if (dpy->bigreq_size || req->length + len <= (unsigned) 65535) {
 	    SetReqLen(req, len, len);
 	    len = (long)nelements << 2;
-	    Data32 (dpy, (long *) data, len);
+	    Data32 (dpy, (_Xconst long *) data, len);
 	} /* else force BadLength */
 	break;
 
-- 
2.5.3