Fix small mistake in d8.js.

R=mvstanton@chromium.org
BUG=v8:2756

Review URL: https://codereview.chromium.org/18572009

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@15463 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/d8.js

@@ -1020,7 +1020,7 @@ DebugRequest.prototype.changeBreakpointCommandToJSONRequest_ =
           args.substring(nextPos + 1, args.length) : 'all';
       if (!arg2) {
         arg2 = 'all'; // if unspecified, set for all.
-      } if (arg2 == 'unc') { // check for short cut.
+      } else if (arg2 == 'unc') { // check for short cut.
         arg2 = 'uncaught';
       }
       excType = arg2;