Bug #470 - 'task rc.color.alternate:none list' shows incorrect colors

- Fixed bug #470, which caused task to not support the color 'none'.
  Simultaneous vitapi bug fix.

ChangeLog

@@ -55,6 +55,7 @@
    used, with few tasks.
  + Fixed bug #466, which gave the wrong error message when a custom report
    was missing a direction indicator for the sort order.
+ + Fixed bug #470, which caused task to not support the color 'none'.
  + Fixed problem with command line configuration overrides that had no
    values. 
  + Fixed problem with the 'undo' command not observing the rc.color or the

src/Color.cpp

@@ -127,15 +127,18 @@ Color::Color (const std::string& spec)
     // X where X is one of black, red, blue ...
     else if ((index = find (word)) != -1)
     {
-      if (bg)
+      if (index)
       {
-        bg_value |= _COLOR_HASBG;
-        bg_value |= index << 8;
-      }
-      else
-      {
-        fg_value |= _COLOR_HASFG;
-        fg_value |= index;
+        if (bg)
+        {
+          bg_value |= _COLOR_HASBG;
+          bg_value |= index << 8;
+        }
+        else
+        {
+          fg_value |= _COLOR_HASFG;
+          fg_value |= index;
+        }
       }
     }