Fix the logic block to bump the correct block.

Previously it was always bumping the first block added
even if you are putting the new block over the first block, so it
bumped the new block as well.

blocks/logic.js

@@ -312,19 +312,18 @@ Blockly.Blocks['logic_compare'] = {
     }
     var blockA = this.getInputTargetBlock('A');
     var blockB = this.getInputTargetBlock('B');
-    // Keep track of which block was added second
-    // (so the first block may be ejected upon mismatch).
-    if (blockA && !blockB) {
-      this.blockAPriority_ = false;
-    } else if (!blockA && blockB) {
-      this.blockAPriority_ = true;
-    } else if (blockA && blockB &&
+    // Kick blocks that existed prior to this change if they don't match
+    if (this.blocks_ && blockA && blockB &&
             !blockA.outputConnection.checkType_(blockB.outputConnection)) {
-      // Mismatch between two inputs.  Disconnect one and bump it away.
-      var child = this.blockAPriority_ ? blockB : blockA;
-      child.setParent(null);
-      child.bumpNeighbours_();
+      // Mismatch between two inputs.  Disconnect previous and bump it away.
+      goog.array.forEach(this.blocks_, function(e) {
+        if (e === blockA || e === blockB) {
+          e.setParent(null);
+          e.bumpNeighbours_();
         }
+      });
+    }
+    this.blocks_ = [blockA, blockB];
   }
 };