Fail to save sketch if user attempts to save it with the same name of one of its tabs, excluding the first. Fixes #3914

Author: Federico Fissore

app/src/processing/app/Sketch.java

@@ -652,14 +652,13 @@ protected boolean saveAs() throws IOException {
     // make sure there doesn't exist a .cpp file with that name already
     // but ignore this situation for the first tab, since it's probably being
     // resaved (with the same name) to another location/folder.
-    for (SketchCode code : data.getCodes()) {
-      if (newName.equalsIgnoreCase(code.getPrettyName()) && code.isExtension("cpp")) {
+    for (int i = 0; i < data.getCodeCount(); i++) {
+      SketchCode code = data.getCode(i);
+      if (newName.equalsIgnoreCase(code.getPrettyName())) {
         Base.showMessage(tr("Error"),
-                I18n.format(
-                        tr("You can't save the sketch as \"{0}\"\n" +
-                                "because the sketch already has a .cpp file with that name."),
-                        newName
-                ));
+          I18n.format(tr("You can't save the sketch as \"{0}\"\n" +
+            "because the sketch already has a file with that name."), newName
+          ));
         return false;
       }
     }