patch 8.1.0545: when executing indent tests user preferences interfere

Problem:    When executing indent tests user preferences interfere.
Solution:   Add "--clean".
diff --git a/src/version.c b/src/version.c
index da6243b..42ce472 100644
--- a/src/version.c
+++ b/src/version.c
@@ -793,6 +793,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    545,
+/**/
     544,
 /**/
     543,