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

@@ -126,6 +126,8 @@ Color::Color (const std::string& spec)
 
     // X where X is one of black, red, blue ...
     else if ((index = find (word)) != -1)
+    {
+      if (index)
       {
         if (bg)
         {
@@ -138,6 +140,7 @@ Color::Color (const std::string& spec)
           fg_value |= index;
         }
       }
+    }
 
     // greyN/grayN, where 0 <= N <= 23.
     else if (word.substr (0, 4) == "grey" ||