[metacity] xprops: remove unneeded NULL check

[Alberts Muktupāvels <muktupavels src gnome org>]

commit 141096385cb170b3dd00fed812c0c21db85a0b33
Author: Alberts Muktupāvels <alberts muktupavels gmail com>
Date:   Sun Mar 14 20:31:49 2021 +0200

    xprops: remove unneeded NULL check
    
    Coverity CID: #1418331

 src/core/xprops.c | 7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)
---
diff --git a/src/core/xprops.c b/src/core/xprops.c
index 4b701af7c..4175611d3 100644
--- a/src/core/xprops.c
+++ b/src/core/xprops.c
@@ -795,11 +795,8 @@ wm_hints_from_results (GetPropertyResults *results,
   else
     hints->window_group = 0;
 
-  if (results->prop)
-    {
-      XFree (results->prop);
-      results->prop = NULL;
-    }
+  XFree (results->prop);
+  results->prop = NULL;
 
   *hints_p = hints;