unicode: silence perl warning about empty query range offsets

Stop complaining [Argument "" isn't numeric] about implicit 0- in presets
like 'latin/sample=-1'.

diff --git a/unicode.plp b/unicode.plp
index ffee44f386fbb0c6a5d154458fa678aff8dd3191..1f7414446c1d44a14f49048b1aa07c3d67491002 100644 (file)
--- a/unicode.plp
+++ b/unicode.plp
@@ -152,6 +152,7 @@ $glyphs->print(map {
                                last if $table->[$rowlen] =~ /\./;
                        }
                        my @cells = map {
                                last if $table->[$rowlen] =~ /\./;
                        }
                        my @cells = map {

+                               s/^(?=-)/0/;

                                my $end = (s/-(.+)?// ? ($1 // @$table / $rowlen - 1) : $_) + 1;
                                $_ * $rowlen .. $end * $rowlen - 1;
                        } @select;
                                my $end = (s/-(.+)?// ? ($1 // @$table / $rowlen - 1) : $_) + 1;
                                $_ * $rowlen .. $end * $rowlen - 1;
                        } @select;