Trivial fix for variable name numbering

ICSharpCode.Decompiler/Ast/AstMethodBodyBuilder.cs

@@ -1,14 +1,14 @@
-using System;
-using System.Collections.Generic;
-using System.Diagnostics;
-using System.Linq;
-using Ast = ICSharpCode.NRefactory.CSharp;
-using ICSharpCode.NRefactory.CSharp;
-using Cecil = Mono.Cecil;
-using Mono.Cecil;
-using Mono.Cecil.Cil;
-using Mono.Cecil.Rocks;
-using Decompiler.ControlFlow;
+using System;
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.Linq;
+using Ast = ICSharpCode.NRefactory.CSharp;
+using ICSharpCode.NRefactory.CSharp;
+using Cecil = Mono.Cecil;
+using Mono.Cecil;
+using Mono.Cecil.Cil;
+using Mono.Cecil.Rocks;
+using Decompiler.ControlFlow;
 
 namespace Decompiler
 {
@@ -79,8 +79,8 @@ namespace Decompiler
 					if (!typeNames.ContainsKey(name)) {
 						typeNames.Add(name, 0);
 					}
-					int count = typeNames[name];
-					if (count > 0) {
+					int count = ++(typeNames[name]);
+					if (count > 1) {
 						name += count.ToString();
 					}
 					varDef.Name = name;