Unit Tests

- Added null values for color.tagged and color.alternate, for the
  tests it affects.

src/tests/cal.t

@@ -155,6 +155,7 @@ if (open my $fh, '>', 'details.rc')
             "calendar.details.report=list\n",
             "calendar.holidays=full\n",
             "color=on\n",
+            "color.alternate=\n",
             "confirmation=no\n",
             "holiday.AAAA.name=AAAA\n",
             "holiday.AAAA.date=20150101\n",

src/tests/color.pri.t

@@ -38,6 +38,7 @@ if (open my $fh, '>', 'color.rc')
             "color.pri.M=green\n",
             "color.pri.L=blue\n",
             "color.pri.none=yellow\n",
+            "color.alternate=\n",
             "_forcecolor=1\n";
   close $fh;
   ok (-r 'color.rc', 'Created color.rc');

src/tests/color.tag.t

@@ -34,6 +34,8 @@ use Test::More tests => 7;
 if (open my $fh, '>', 'color.rc')
 {
   print $fh "data.location=.\n",
+            "color.tagged=\n",
+            "color.alternate=\n",
             "color.tag.red=red\n",
             "color.tag.green=green\n",
             "_forcecolor=1\n";

src/tests/due.t

@@ -37,6 +37,7 @@ if (open my $fh, '>', 'due.rc')
             "due=4\n",
             "color=on\n",
             "color.due=red\n",
+            "color.alternate=\n",
             "_forcecolor=on\n",
             "dateformat=m/d/Y\n";
   close $fh;