patch 8.2.1977: Vim9: error for using a string in a condition is confusing

Problem:    Vim9: error for using a string in a condition is confusing.
Solution:   Give a more specific error.  Also adjust the compile time type
            checking for || and &&.
diff --git a/src/version.c b/src/version.c
index 28f95cf..092801c 100644
--- a/src/version.c
+++ b/src/version.c
@@ -751,6 +751,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1977,
+/**/
     1976,
 /**/
     1975,