[PATCH libXi] Stop unnecessary calls to size_classes

[Peter Hutterer]

Xmalloc is a macro evaluating its argument twice.

Signed-off-by: Peter Hutterer <peter.hutterer at who-t.net>
---
 src/XIQueryDevice.c |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)

diff --git a/src/XIQueryDevice.c b/src/XIQueryDevice.c
index af2f27a..66452c2 100644
--- a/src/XIQueryDevice.c
+++ b/src/XIQueryDevice.c
@@ -71,6 +71,7 @@ XIQueryDevice(Display *dpy, int deviceid, int *ndevices_return)
     for (i = 0; i < reply.num_devices; i++)
     {
         int             nclasses;
+        size_t          sz;
         XIDeviceInfo    *lib = &info[i];
         xXIDeviceInfo   *wire = (xXIDeviceInfo*)ptr;
 
@@ -86,7 +87,8 @@ XIQueryDevice(Display *dpy, int deviceid, int *ndevices_return)
         strncpy(lib->name, ptr, wire->name_len);
         ptr += ((wire->name_len + 3)/4) * 4;
 
-        lib->classes = Xmalloc(size_classes((xXIAnyInfo*)ptr, nclasses));
+        sz = size_classes((xXIAnyInfo*)ptr, nclasses);
+        lib->classes = Xmalloc(sz);
         ptr += copy_classes(lib, (xXIAnyInfo*)ptr, &nclasses);
         /* We skip over unused classes */
         lib->num_classes = nclasses;
-- 
1.7.7.1