patch 8.1.1212: signal PWR is not tested

Problem:    Signal PWR is not tested.
Solution:   Test that PWR updates the swap file. (Dominique Pelle,
            closes #4312)
diff --git a/src/version.c b/src/version.c
index dbf577d..704ff54 100644
--- a/src/version.c
+++ b/src/version.c
@@ -768,6 +768,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1212,
+/**/
     1211,
 /**/
     1210,