Merge branch 'fn/maint-mkdtemp-compat' into maint

* fn/maint-mkdtemp-compat:
  Fix gitmkdtemp: correct test for mktemp() return value

Author: gitster

compat/mkdtemp.c

@@ -2,7 +2,7 @@
 
 char *gitmkdtemp(char *template)
 {
-	if (!mktemp(template) || mkdir(template, 0700))
+	if (!*mktemp(template) || mkdir(template, 0700))
 		return NULL;
 	return template;
 }