Fix NRE when getting annotations on delegate constructor for delegates defined in Java (because these constructors don't really exist).

runtime/TypeWrapper.cs

@@ -10110,6 +10110,11 @@ namespace IKVM.Internal
 		internal override object[] GetMethodAnnotations(MethodWrapper mw)
 		{
 			MethodBase mb = mw.GetMethod();
+			if(mb == null)
+			{
+				// delegate constructor
+				return null;
+			}
 			if(mb.DeclaringType.Assembly.ReflectionOnly)
 			{
 				// TODO on Whidbey this must be implemented
@@ -10121,6 +10126,11 @@ namespace IKVM.Internal
 		internal override object[][] GetParameterAnnotations(MethodWrapper mw)
 		{
 			MethodBase mb = mw.GetMethod();
+			if(mb == null)
+			{
+				// delegate constructor
+				return null;
+			}
 			if(mb.DeclaringType.Assembly.ReflectionOnly)
 			{
 				// TODO on Whidbey this must be implemented