Don't eliminate delegate caching when lambda decompilation is disabled.

Closes #388

ICSharpCode.Decompiler/ILAst/ILAstOptimizer.cs

@@ -225,11 +225,13 @@ namespace ICSharpCode.Decompiler.ILAst
 			new ILInlining(method).InlineAllVariables();
 			
 			if (abortBeforeStep == ILAstOptimizationStep.CachedDelegateInitialization) return;
-			foreach(ILBlock block in method.GetSelfAndChildrenRecursive<ILBlock>()) {
-				for (int i = 0; i < block.Body.Count; i++) {
-					// TODO: Move before loops
-					CachedDelegateInitializationWithField(block, ref i);
-					CachedDelegateInitializationWithLocal(block, ref i);
+			if (context.Settings.AnonymousMethods) {
+				foreach(ILBlock block in method.GetSelfAndChildrenRecursive<ILBlock>()) {
+					for (int i = 0; i < block.Body.Count; i++) {
+						// TODO: Move before loops
+						CachedDelegateInitializationWithField(block, ref i);
+						CachedDelegateInitializationWithLocal(block, ref i);
+					}
 				}
 			}
 			

ICSharpCode.Decompiler/Tests/DelegateConstruction.cs

@@ -62,6 +62,22 @@ public static class DelegateConstruction
 			}
 			return null;
 		}
+		
+		public void LambdaInForLoop()
+		{
+			for (int i = 0; i < 100000; i++) {
+			    Bar(() => Foo());
+			}
+		}
+		
+		public int Foo()
+		{
+			return 0;
+		}
+		
+		public void Bar(Func<int> f)
+		{
+		}
 	}
 
 	public static void Test(this string a)