patch 8.2.5107: some callers of rettv_list_alloc() check for not OK

Problem:    Some callers of rettv_list_alloc() check for not OK. (Christ van
            Willegen)
Solution:   Use "==" instead of "!=" when checking the return value.
diff --git a/src/time.c b/src/time.c
index d768742..4adcce5 100644
--- a/src/time.c
+++ b/src/time.c
@@ -172,7 +172,7 @@
     proftime_T	start;
     long	n1, n2;
 
-    if (rettv_list_alloc(rettv) != OK)
+    if (rettv_list_alloc(rettv) == FAIL)
 	return;
 
     if (in_vim9script()
@@ -787,7 +787,7 @@
 {
     timer_T *timer = NULL;
 
-    if (rettv_list_alloc(rettv) != OK)
+    if (rettv_list_alloc(rettv) == FAIL)
 	return;
 
     if (in_vim9script() && check_for_opt_number_arg(argvars, 0) == FAIL)