fixed #115

prevent loading several instances of the same block definition

gui.js

@@ -2808,6 +2808,7 @@ IDE_Morph.prototype.rawOpenBlocksString = function (str, name, silently) {
         blocks.forEach(function (def) {
             def.receiver = myself.stage;
             myself.stage.globalBlocks.push(def);
+            myself.stage.replaceDoubleDefinitionsFor(def);
         });
         this.flushPaletteCache();
         this.refreshPalette();

history.txt

@@ -1904,3 +1904,4 @@ ______
 * GUI: getPublicProject adjustments (lowercase username)
 * GUI: prompt() - invocation fixes (null-choices)
 * GUI: synchronous URL fetching simplifications for libraries and example projects
+* GUI: fixed #115 - prevent loading several instances of the same block definition