[glib/no-free-check] Do not check for NULL when calling free()

[Emmanuele Bassi <ebassi src gnome org>]

commit 84d013ed463838dbd065ec538009bd9bd7a8806f
Author: Emmanuele Bassi <ebassi gnome org>
Date:   Tue Dec 18 13:27:43 2018 +0000

    Do not check for NULL when calling free()
    
    The C standard guarantees that `free()` is `NULL`-safe.

 glib/gmem.c | 9 +++------
 1 file changed, 3 insertions(+), 6 deletions(-)
---
diff --git a/glib/gmem.c b/glib/gmem.c
index b72a58335..09cd04140 100644
--- a/glib/gmem.c
+++ b/glib/gmem.c
@@ -170,8 +170,7 @@ g_realloc (gpointer mem,
                G_STRLOC, n_bytes);
     }
 
-  if (mem)
-    free (mem);
+  free (mem);
 
   TRACE (GLIB_MEM_REALLOC((void*) NULL, (void*)mem, 0, 0));
 
@@ -190,8 +189,7 @@ g_realloc (gpointer mem,
 void
 g_free (gpointer mem)
 {
-  if (G_LIKELY (mem))
-    free (mem);
+  free (mem);
   TRACE(GLIB_MEM_FREE((void*) mem));
 }
 
@@ -304,8 +302,7 @@ g_try_realloc (gpointer mem,
   else
     {
       newmem = NULL;
-      if (mem)
-       free (mem);
+      free (mem);
     }
 
   TRACE (GLIB_MEM_REALLOC((void*) newmem, (void*)mem, (unsigned int) n_bytes, 1));