DevTools: Fix typo causing exception on heap profiles with no target.

Source/devtools/front_end/profiler/HeapSnapshotView.js

 /*
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 737 matching lines @@
     {
         var selectedNode = event.target.selectedNode;
         this._constructorsDataGrid.setAllocationNodeId(selectedNode.allocationNodeId());
         this._setSelectedNodeForDetailsView(null);
     },
 
     _inspectedObjectChanged: function(event)
     {
         var selectedNode = event.target.selectedNode;
         var target = this._profile.target();
-        if (!target && selectedNode instanceof WebInspector.HeapSnapshotGenericObjectNode)
+        if (target && selectedNode instanceof WebInspector.HeapSnapshotGenericObjectNode)
             target.consoleAgent().addInspectedHeapObject(selectedNode.snapshotNodeId);
     },
 
     /**
      * @param {?WebInspector.HeapSnapshotGridNode} nodeItem
      */
     _setSelectedNodeForDetailsView: function(nodeItem)
     {
         var dataSource = nodeItem && nodeItem.retainersDataSource();
         if (dataSource) {
@@ skipping 1408 matching lines @@
             name.textContent = frame.functionName;
             if (frame.scriptId) {
                 var urlElement = this._linkifier.linkifyScriptLocation(this._target, String(frame.scriptId), frame.scriptName, frame.line - 1, frame.column - 1);
                 frameDiv.appendChild(urlElement);
             }
         }
     },
 
     __proto__: WebInspector.View.prototype
 }