Fix C++ backend binding sample.

samples/CppBackendBinding/CppBackendBinding.addin

@@ -38,7 +38,7 @@
 		<!-- TODO: project option panels -->
 	</Path>
 	
-	<Path name = "/SharpDevelop/Workbench/LanguageBindings">
+	<Path name = "/SharpDevelop/Workbench/ProjectBindings">
 		<ProjectBinding id                   = "C++"
 		                guid                 = "{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}"
 		                supportedextensions  = ".cpp;.c"

samples/CppBackendBinding/CppProjectBinding.cs

@@ -33,5 +33,11 @@ namespace CppBackendBinding
 		{
 			throw new NotImplementedException();
 		}
+		
+		public bool HandlingMissingProject {
+			get {
+				return false;
+			}
+		}
 	}
 }