Fixes

Fixed bug in addressing more than 32767 bytes of global variables.
Having two Sub with identical name now causes compiler error.

EV3BasicCompiler/Compiler.cs

@@ -1685,6 +1685,8 @@ namespace EV3BasicCompiler
             parse_keyword("SUB");
             String subname = parse_id();
 
+            if (subcallstructure.ContainsKey(subname)) s.ThrowParseError("Redefined Sub " + subname);
+
             subcallstructure[subname] = new List<String>();
             subcallstructure[subname].Add(subname);
 

LMSAssembler/LMSObject.cs

@@ -116,7 +116,7 @@ namespace LMSAssembler
             else
             {
                 program.WriteByte((byte) (local?0xc3:0xe3));
-                DataWriter.Write16(program, index);
+                DataWriter.Write32(program, index);
             }
         }
         public void AddStringLiteral(String s)