Use pclose() instead of fclose()

The return value from popen() is a normal standard I/O stream in all
respects save that it must be closed with pclose() rather than
fclose(3).

Solves the following warning when compiled with -Wmismatched-dealloc:

errno.c: In function ‘search_all’:
errno.c:126:5: warning: ‘fclose’ called on pointer returned from a
                         mismatched allocation function
                         [-Wmismatched-dealloc]
  126 |     fclose(f);
      |     ^~~~~~~~~
errno.c:113:9: note: returned from ‘popen’
  113 |     f = popen("locale -a", "r");
      |         ^~~~~~~~~~~~~~~~~~~~~~~

1 files changed, 1 insertions, 1 deletions

diff --git a/errno.c b/errno.c
index d2f68a1..fcf3dee 100644
--- a/errno.c
+++ b/errno.c
@@ -123,7 +123,7 @@ search_all(int num_words, char **words)
         search(num_words, words);
     }
 
-    fclose(f);
+    pclose(f);
 }