Assume `free (NULL)' works.

4 files changed, 4 insertions, 8 deletions

diff --git a/src/dd.c b/src/dd.c
index 9c7c96cfe..26929bdcb 100644
--- a/src/dd.c
+++ b/src/dd.c
@@ -1543,8 +1543,7 @@ dd_copy (void)
     }
 
   free (real_buf);
-  if (real_obuf)
-    free (real_obuf);
+  free (real_obuf);
 
   if ((conversions_mask & C_FDATASYNC) && fdatasync (STDOUT_FILENO) != 0)
     {
diff --git a/src/df.c b/src/df.c
index 176f89b89..49de58c41 100644
--- a/src/df.c
+++ b/src/df.c
@@ -591,8 +591,7 @@ show_point (const char *point, const struct stat *statp)
 	      }
 	}
 
-      if (resolved)
-	free (resolved);
+      free (resolved);
 
       if (best_match
 	  && (stat (best_match->me_mountdir, &disk_stats) != 0
diff --git a/src/dircolors.c b/src/dircolors.c
index 1253980d0..1dbe6c4b4 100644
--- a/src/dircolors.c
+++ b/src/dircolors.c
@@ -364,8 +364,7 @@ dc_parse_stream (FILE *fp, const char *filename)
 	}
 
       free (keywd);
-      if (arg)
-	free (arg);
+      free (arg);
     }
 
   return ok;
diff --git a/src/head.c b/src/head.c
index 3b54e8849..253ace50e 100644
--- a/src/head.c
+++ b/src/head.c
@@ -392,8 +392,7 @@ elide_tail_bytes_pipe (const char *filename, int fd, uintmax_t n_elide_0)
 
     free_mem:;
       for (i = 0; i < n_bufs; i++)
-	if (b[i])
-	  free (b[i]);
+	free (b[i]);
       free (b);
 
       return ok;