Lowering minimum size for Editor text area.

This should make it possible to shrink the overall IDE window without
losing the scroll bars on the text pane.

http://code.google.com/p/arduino/issues/detail?id=52

app/src/processing/app/syntax/TextAreaPainter.java

@@ -515,7 +515,10 @@ public Dimension getPreferredSize()
    */
   public Dimension getMinimumSize()
   {
-    return getPreferredSize();
+    Dimension dim = new Dimension();
+    dim.width = fm.charWidth('w') * 10;
+    dim.height = fm.getHeight() * 4;
+    return dim;
   }
 
   // package-private members