patch 8.1.0793: incorrect error messages for functions that take a Blob

Problem:    Incorrect error messages for functions that now take a Blob
            argument.
Solution:   Adjust the error messages. (Dominique Pelle, closes #3846)
diff --git a/src/version.c b/src/version.c
index 0aa15d7..cef2e4b 100644
--- a/src/version.c
+++ b/src/version.c
@@ -792,6 +792,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    793,
+/**/
     792,
 /**/
     791,