more fixes to Editor and Sketch

app/Editor.java

@@ -952,6 +952,8 @@ public class Editor extends JFrame
       console.clear();
     }
 
+
+
     presenting = present;
     /*
     if (presenting) {
@@ -1671,20 +1673,21 @@ public class Editor extends JFrame
 
 
   public void error(Exception e) {
-    //System.out.println("ERORROOROROR 1");
-    //status.error(e.getMessage());
+    if (e == null) {
+      System.err.println("Editor.error() was passed a null exception.");
+      return;
+    }
 
     // not sure if any RuntimeExceptions will actually arrive
     // through here, but gonna check for em just in case.
     String mess = e.getMessage();
-    //System.out.println("MESSY: " + mess);
-    String rxString = "RuntimeException: ";
-    if (mess.indexOf(rxString) == 0) {
-      mess = mess.substring(rxString.length());
-      //System.out.println("MESS2: " + mess);
+    if (mess != null) {
+      String rxString = "RuntimeException: ";
+      if (mess.indexOf(rxString) == 0) {
+        mess = mess.substring(rxString.length());
+      }
+      status.error(mess);
     }
-    status.error(mess);
-
     e.printStackTrace();
   }
 

app/Sketch.java

@@ -736,14 +736,6 @@ public class Sketch {
   }
 
 
-  /*
-  public void saveCurrent() throws IOException {
-    current.save();
-    calcModified();
-  }
-  */
-
-
   /**
    * Handles 'Save As' for a sketch.
    * <P>
@@ -778,14 +770,24 @@ public class Sketch {
     newName = Sketchbook.sanitizeName(newName);
 
     // make sure there doesn't exist a tab with that name already
-    File checkAlready = new File(folder, newName + ".pde");
-    if (checkAlready.exists()) {
+    File codeAlready = new File(folder, newName + ".pde");
+    if (codeAlready.exists()) {
       Base.showMessage("Nope",
                        "You can't save the sketch as \"" + newName + "\"\n" +
                        "because the sketch already has a tab with that name.");
       return false;
     }
 
+    // make sure there doesn't exist a tab with that name already
+    File hiddenAlready = new File(folder, newName + ".pde.x");
+    if (hiddenAlready.exists()) {
+      Base.showMessage("Nope",
+                       "You can't save the sketch as \"" + newName + "\"\n" +
+                       "because the sketch already has a " +
+                       "hidden tab with that name.");
+      return false;
+    }
+
     // new sketch folder
     File newFolder = new File(newParentDir, newName);