apkbuild-cpan.in: prevent inserting extra new line before checksum on upgrade

apkbuild-cpan.in

@@ -622,6 +622,10 @@ given ( $ARGV[0] ) {
 			$text =~ s/^pkgver=(.*)$/pkgver=$pkgver/mg or
 				die "Can't find pkgver line in APKBUILD";
 			$text =~ s/^pkgrel=(.*)$/pkgrel=0/mg;
+                        #FIXME: review whether this works over time
+                        #       It deletes the blank line before the checksum
+                        #       So prepare_tree does not insert extra blank line
+			$text =~ s/\n^(.*sums=.*\n)/$1/mg;
 			open my $fh, '>', "APKBUILD" or die;
 			say $fh $text;
 			close $fh;