Reduce nesting.

src/Generator/Passes/FindSymbolsPass.cs

@@ -23,18 +23,19 @@ namespace CppSharp.Passes
             get { return wait; }
             set
             {
-                if (wait != value)
+                if (wait == value)
-                {
+                    return;
+
                 wait = value;
-                    if (!wait && manualResetEvent != null)
+
-                    {
+                if (wait || manualResetEvent == null)
+                    return;
+
                 manualResetEvent.Set();
                 manualResetEvent.Dispose();
                 manualResetEvent = null;
             }
         }
-            }
-        }
 
         public override bool VisitASTContext(ASTContext context)
         {