[Java.Interop] Fix FEATURE_HANDLES_ARE_INTPTRS compilation.

Commit 25de1f3 didn't compile when FEATURE_HANDLES_ARE_INTPTRS was
set. Oops.

Fix compilation and unit test failures.

Author: jonpryor

src/Java.Interop/Java.Interop/JniAllocObjectRef.cs

@@ -1,5 +1,6 @@
 using System;
 
+#if FEATURE_HANDLES_ARE_SAFE_HANDLES
 namespace Java.Interop {
 
 	sealed class JniAllocObjectRef : JniLocalReference
@@ -10,4 +11,4 @@ public JniAllocObjectRef (IntPtr handle)
 		}
 	}
 }
-
+#endif  // FEATURE_HANDLES_ARE_SAFE_HANDLES

src/Java.Interop/Java.Interop/JniEnvironment.cs

@@ -73,6 +73,7 @@ public JavaVM JavaVM {
 			}
 		}
 
+#if FEATURE_HANDLES_ARE_SAFE_HANDLES
 		List<JniLocalReference> lrefs;
 		internal List<JniLocalReference> LocalReferences {
 			get {return lrefs ?? (lrefs = new List<JniLocalReference> ());}
@@ -92,6 +93,7 @@ internal static bool IsHandleValid (JniLocalReference lref)
 			}
 			return false;
 		}
+#endif  // FEATURE_HANDLES_ARE_SAFE_HANDLES
 
 		internal    static  bool    HasCurrent {
 			get {return current != null;}
@@ -213,6 +215,15 @@ internal void DeleteLocalReference (JniLocalReference value, IntPtr handle)
 			value.SetHandleAsInvalid ();
 		}
 #endif  // FEATURE_HANDLES_ARE_SAFE_HANDLES
+#if FEATURE_HANDLES_ARE_INTPTRS
+		internal void LogCreateLocalRef (IntPtr value)
+		{
+			if (value == IntPtr.Zero)
+				return;
+			var r = new JniObjectReference (value, JniObjectReferenceType.Local);
+			LogCreateLocalRef (r);
+		}
+#endif  // FEATURE_HANDLES_ARE_INTPTRS
 
 		JniInstanceMethodInfo Obj_toS;
 		internal    JniInstanceMethodInfo Object_toString {

src/Java.Interop/Java.Interop/JniLocalReference.cs

@@ -2,6 +2,7 @@
 using System.Diagnostics;
 using System.Runtime.InteropServices;
 
+#if FEATURE_HANDLES_ARE_SAFE_HANDLES
 namespace Java.Interop
 {
 	class JniLocalReference : JniReferenceSafeHandle {
@@ -36,3 +37,4 @@ internal JniAllocObjectRef ToAllocObjectRef ()
 		}
 	}
 }
+#endif  // FEATURE_HANDLES_ARE_SAFE_HANDLES

src/Java.Interop/Java.Interop/JniObjectReference.cs

@@ -48,7 +48,7 @@ public  bool                        IsValid {
 				return SafeHandle != null && !SafeHandle.IsInvalid && !SafeHandle.IsClosed;
 #endif  // FEATURE_HANDLES_ARE_SAFE_HANDLES
 #if FEATURE_HANDLES_ARE_INTPTRS
-				return Handle == IntPtr.Zero;
+				return Handle != IntPtr.Zero;
 #endif  // FEATURE_HANDLES_ARE_SAFE_HANDLES
 			}
 		}