[PATCH xts] Drop use of perl's given/when construct

[Peter Harris]

The perl mongers have retroactively marked this construct
"experimental", five and a half years after it was marked stable.

http://perldoc.perl.org/perl5180delta.html#The-smartmatch-family-of-features-are-now-experimental

Signed-off-by: Peter Harris <pharris at opentext.com>
---
 xts5/bin/xts-config.in | 13 +++++++++----
 1 file changed, 9 insertions(+), 4 deletions(-)

diff --git a/xts5/bin/xts-config.in b/xts5/bin/xts-config.in
index dbe84da..2dbe653 100755
--- a/xts5/bin/xts-config.in
+++ b/xts5/bin/xts-config.in
@@ -1,6 +1,5 @@
 #!/usr/bin/perl -pi.bak
 
-use 5.10.0;
 use warnings;
 use strict;
 use Sys::Hostname;
@@ -136,10 +135,16 @@ BEGIN
 
 	$::vars{"XT_PIXMAP_DEPTHS"} =~ s/,?\s+/ /g;
 
-	given ($::vars{XT_DOES_BACKING_STORE})
+	if ($::vars{XT_DOES_BACKING_STORE} =~ /yes/i)
+	{
+		$::vars{XT_DOES_BACKING_STORE} = 2;
+	}
+	elsif ($::vars{XT_DOES_BACKING_STORE} =~ /no/i)
+	{
+		$::vars{XT_DOES_BACKING_STORE} = 1;
+	}
+	else
 	{
-		$::vars{XT_DOES_BACKING_STORE} = 2 when (/yes/i);
-		$::vars{XT_DOES_BACKING_STORE} = 1 when (/when/i);
 		$::vars{XT_DOES_BACKING_STORE} = 0;
 	}
 
-- 
1.9.0