fixed processing of @abc's decorators

Author: lostmsu

src/Analysis/Engine/Impl/Analyzer/FunctionAnalysisUnit.cs

@@ -101,7 +101,8 @@ private bool ProcessAbstractDecorators(IAnalysisSet decorator) {
 
             // Only handle these if they are specialized
             foreach (var d in decorator.OfType<SpecializedCallable>()) {
-                if (d.DeclaringModule?.ModuleName != "abc") {
+                if (d.DeclaringModule != null
+                    && d.DeclaringModule.ModuleName != "abc") {
                     continue;
                 }
 

src/Analysis/Engine/Impl/Values/SpecializedNamespace.cs

@@ -217,6 +217,15 @@ public override IEnumerable<ILocationInfo> Locations {
             }
         }
 
+        public override string Name {
+            get {
+                if (_original == null)
+                    return base.Name;
+
+                return _original.Name;
+            }
+        }
+
         public override IEnumerable<OverloadResult> Overloads {
             get {
                 if (_original == null) {