Subject: Portability fix, don't call qsort with NULL/0. Found by coverity
Origin: FILE5_34-22-g7b807237 <https://github.com/file/file/commit/FILE5_34-22-g7b807237>
Upstream-Author: Christos Zoulas <christos@zoulas.com>
Date: Wed Aug 1 10:18:02 2018 +0000

--- a/src/apprentice.c
+++ b/src/apprentice.c
@@ -1347,12 +1347,14 @@
 			filearr[files++] = mfn;
 		}
 		closedir(dir);
-		qsort(filearr, files, sizeof(*filearr), cmpstrp);
-		for (i = 0; i < files; i++) {
-			load_1(ms, action, filearr[i], &errs, mset);
-			free(filearr[i]);
+		if (filearr) {
+			qsort(filearr, files, sizeof(*filearr), cmpstrp);
+			for (i = 0; i < files; i++) {
+				load_1(ms, action, filearr[i], &errs, mset);
+				free(filearr[i]);
+			}
+			free(filearr);
 		}
-		free(filearr);
 	} else
 		load_1(ms, action, fn, &errs, mset);
 	if (errs)