Francois Gouget : testbot: Fix Collection::IsEmpty() on perl 5.20.

[Alexandre Julliard]

Module: tools
Branch: master
Commit: f6720d15fec1fe6d565241a03e607be089854a6b
URL:    https://source.winehq.org/git/tools.git/?a=commit;h=f6720d15fec1fe6d565241a0...

Author: Francois Gouget 
Date:   Fri Mar 30 12:11:51 2018 +0200

testbot: Fix Collection::IsEmpty() on perl 5.20.

Although scalar(%hash) is 0 when the hash is empty, the rest of the time
it is not a number.

Signed-off-by: Francois Gouget 
Signed-off-by: Alexandre Julliard

---

testbot/lib/ObjectModel/Collection.pm | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/testbot/lib/ObjectModel/Collection.pm b/testbot/lib/ObjectModel/Collection.pm
index a57a329..032c738 100644
--- a/testbot/lib/ObjectModel/Collection.pm
+++ b/testbot/lib/ObjectModel/Collection.pm
@@ -420,8 +420,9 @@ sub IsEmpty($)
   }

# Even though scalar(hash) does not return the number of items in Perl 5.20
-  # it returns 0 for an empty hash.
-  return !$self->{Items} || scalar(%{$self->{Items}}) == 0;
+  # (and cannot generally be compared to numbers), it evaluates to true for
+  # all hashes except empty ones.
+  return !$self->{Items} || !%{$self->{Items}};
 }

sub CombineKey($@)