[PATCH libX11] XFree will accept NULL as argument

[walter harms]

since Xfree is a define for free()
  Xlibint.h:#define Xfree(ptr) free((ptr))

Xfree will accept NULL and do nothing.

the patch is also available on github.com/xtforever/libX11.git

---
 man/XFree.man | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/man/XFree.man b/man/XFree.man
index ffc513b..72674a5 100644
--- a/man/XFree.man
+++ b/man/XFree.man
@@ -90,8 +90,9 @@ Specifies the data that are to be freed.
 The
 .ZN XFree
 function is a general-purpose Xlib routine that frees the specified data.
-You must use it to free any objects that were allocated by Xlib,
+You must use it to free any objects that were allocated by Xlib,
 unless an alternate function is explicitly specified for the object.
-A NULL pointer cannot be passed to this function.
+
+If data is NULL, no operation is performed.
 .SH "SEE ALSO"
 \fI\*(xL\fP
-- 
2.1.4