patch 8.2.3660: overflow check uses wrong number

Problem:    Overflow check uses wrong number.
Solution:   Divide by ten.
diff --git a/src/normal.c b/src/normal.c
index adce932..0fbfe92 100644
--- a/src/normal.c
+++ b/src/normal.c
@@ -630,7 +630,7 @@
 		del_from_showcmd(4);	// delete the digit and ~@%
 #endif
 	    }
-	    else if (ca.count0 >= 999999999L)
+	    else if (ca.count0 > 99999999L)
 	    {
 		ca.count0 = 999999999L;
 	    }