Fix simple type patterns.

ICSharpCode.Decompiler.Tests/TestCases/Pretty/PatternMatching.cs

@@ -105,6 +105,10 @@ namespace ICSharpCode.Decompiler.Tests.TestCases.Pretty
 			}
 		}
 
+#if ROSLYN3 || OPT
+		// Roslyn 2.x generates a complex infeasible path in debug builds, which RemoveInfeasiblePathTransform
+		// currently cannot handle. Because this would increase the complexity of that transform, we ignore
+		// this case.
 		public void TypePatternValueTypesWithShortcircuitOr2(object x)
 		{
 			if (F() || !(x is int value))
@@ -116,6 +120,7 @@ namespace ICSharpCode.Decompiler.Tests.TestCases.Pretty
 				Console.WriteLine(value);
 			}
 		}
+#endif
 
 		public void TypePatternGenerics<T>(object x)
 		{
@@ -196,7 +201,7 @@ namespace ICSharpCode.Decompiler.Tests.TestCases.Pretty
 
 		public static void NotTypePatternVariableUsedOutsideTrueBranch(object x)
 		{
-			var text = x as string;
+			string text = x as string;
 			if (text != null && text.Length > 5)
 			{
 				Console.WriteLine("pattern matches");