patch 7.4.1976
Problem:    Number variables are not 64 bits while they could be.
Solution:   Add the num64 feature. (Ken Takata)
diff --git a/src/ex_getln.c b/src/ex_getln.c
index fc0d995..36902e5 100644
--- a/src/ex_getln.c
+++ b/src/ex_getln.c
@@ -6005,7 +6005,7 @@
 {
     int		len;
     int		first = FALSE;
-    long	num;
+    varnumber_T	num;
 
     *str = skipwhite(*str);
     if (**str == '-' || vim_isdigit(**str))  /* parse "from" part of range */