Patch from Mike R. Williamson to fix make set border color in options parsing code

git-svn-id: https://flot.googlecode.com/svn/trunk@126 1e0a6537-2640-0410-bfb7-f154510ff394

NEWS.txt

@@ -25,7 +25,8 @@ Changes:
   $.plot.formatDate(...) (suggestion by Matt Manela) and even
   replaced.
 
-- Added "borderColor" option to the grid (patch from achamayou).
+- Added "borderColor" option to the grid (patch from achamayou and
+  patch from Mike R. Williamson).
   
 Bug fixes:
 

jquery.flot.js

@@ -161,7 +161,8 @@
         
         function parseOptions(o) {
             $.extend(true, options, o);
-
+            if (options.grid.borderColor == null)
+                options.grid.borderColor = options.grid.color
             // backwards compatibility, to be removed in future
             if (options.xaxis.noTicks && options.xaxis.ticks == null)
                 options.xaxis.ticks = options.xaxis.noTicks;
@@ -969,7 +970,7 @@
             if (options.grid.borderWidth) {
                 // draw border
                 ctx.lineWidth = options.grid.borderWidth;
-                ctx.strokeStyle = options.grid.borderColor ? options.grid.borderColor : options.grid.color;
+                ctx.strokeStyle = options.grid.borderColor;
                 ctx.lineJoin = "round";
                 ctx.strokeRect(0, 0, plotWidth, plotHeight);
             }