patch 9.1.1312: tests: Test_backupskip() fails when HOME is defined

Problem:  tests: Test_backupskip() fails when HOME is defined
Solution: unset $HOME temporarily

Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/src/version.c b/src/version.c
index 7aae2b5..2a51b42 100644
--- a/src/version.c
+++ b/src/version.c
@@ -705,6 +705,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1312,
+/**/
     1311,
 /**/
     1310,