Fix errors with perl 5.22

https://bugzilla.redhat.com/show_bug.cgi?id=1259481

--- lib/BackupPC/CGI/Browse.pm.orig	Wed May 18 10:01:30 2016
+++ lib/BackupPC/CGI/Browse.pm	Wed May 18 10:02:15 2016
@@ -106,7 +106,7 @@ sub action
         my($fLast, $fLastum, @DirStr);
 
 	$attr = $view->dirAttrib($num, $share, $relDir);
-        if ( !defined($attr) ) {
+        if ( !$attr ) {
             $relDir = decode_utf8($relDir);
             ErrorExit(eval("qq{$Lang->{Can_t_browse_bad_directory_name2}}"));
         }
@@ -134,7 +134,7 @@ sub action
             $path     =~ s/([^\w.\/-])/uc sprintf("%%%02X", ord($1))/eg;
             $fURI     =~ s/([^\w.\/-])/uc sprintf("%%%02X", ord($1))/eg;
             $shareURI =~ s/([^\w.\/-])/uc sprintf("%%%02X", ord($1))/eg;
-            $dirOpen  = 1 if ( defined($currDir) && $f eq $currDir );
+            $dirOpen  = 1 if ( $currDir && $f eq $currDir );
             if ( $attr->{$f}{type} == BPC_FTYPE_DIR ) {
                 #
                 # Display directory if it exists in current backup.
@@ -171,7 +171,7 @@ EOF
 		    foreach my $d ( @DirStrPrev ) {
 			$lastTick = $d if ( $d->{needTick} );
 		    }
-		    $doneLastTick = 1 if ( !defined($lastTick) );
+		    $doneLastTick = 1 if ( !$lastTick );
 		    foreach my $d ( @DirStrPrev ) {
 			$img = 0;
 			if  ( $d->{needTick} ) {
@@ -197,7 +197,7 @@ EOF
                 # This is the selected directory, so display all the files
                 #
                 my ($attrStr, $iconStr);
-                if ( defined($a = $attr->{$f}) ) {
+                if ( $a = $attr->{$f} ) {
                     my $mtimeStr = $bpc->timeStamp($a->{mtime});
 		    # UGH -> fix this
                     my $typeStr  = BackupPC::Attrib::fileType2Text(undef,