Allow mixed configuration in compilation units (issue #809)

src/ArduinoJson/Memory/MemoryPool.hpp

@@ -11,8 +11,7 @@
 #include "../Configuration.hpp"
 #include "../Polyfills/attributes.hpp"
 
-namespace ArduinoJson {
-namespace Internals {
+namespace ARDUINOJSON_NAMESPACE {
 // Handle the memory management (done in derived classes) and calls the parser.
 // This abstract class is implemented by StaticMemoryPool which implements a
 // fixed memory allocation.
@@ -38,5 +37,4 @@ class MemoryPool {
 #endif
   }
 };
-}  // namespace Internals
-}  // namespace ArduinoJson
+}  // namespace ARDUINOJSON_NAMESPACE