Explicitly cast the callback and userData pointers to jlong to safely…

… pass them to the Java code:

- on win32 pointers are 4 bytes
- reinterpret_cast win32_ptr to jlong type allows us to safely pass it from native -> Java -> to native

src/main/c/jni-lib/src/listeners/DxEventListener.cpp

@@ -11,7 +11,9 @@ namespace dxfeed {
   DxEventListener* DxEventListener::create(JNIEnv* env, dxfg_feed_event_listener_function callback, void* userData) {
     auto dxSubscriptionJniClass = jni::safeFindClass(env, "com/dxfeed/api/DxSubscriptionJni");
     auto newEventListenerId = jni::safeGetStaticMethodID(env, dxSubscriptionJniClass, "newEventListener", "(JJ)J");
-    auto result = jni::checkedCallStaticLongMethod(env, dxSubscriptionJniClass, newEventListenerId, callback, userData);
+    auto pCallback = dxfeed::r_cast<jlong>(callback);
+    auto pUserData = dxfeed::r_cast<jlong>(userData);
+    auto result = jni::checkedCallStaticLongMethod(env, dxSubscriptionJniClass, newEventListenerId, pCallback, pUserData);
     env->DeleteLocalRef(dxSubscriptionJniClass);
     return new DxEventListener(result);
   }

src/main/c/jni-lib/src/listeners/DxStateChangeListener.cpp

@@ -14,7 +14,9 @@ namespace dxfeed {
     auto dxEndpointClass = jni::safeFindClass(env, "com/dxfeed/api/DxEndpointJni");
     auto newStateChangeListenerId =
       jni::safeGetStaticMethodID(env, dxEndpointClass, "newStateChangeEventListener", "(JJ)J");
-    auto result = jni::checkedCallStaticLongMethod(env, dxEndpointClass, newStateChangeListenerId, callback, userData);
+    auto pCallback = dxfeed::r_cast<jlong>(callback);
+    auto pUserData = dxfeed::r_cast<jlong>(userData);
+    auto result = jni::checkedCallStaticLongMethod(env, dxEndpointClass, newStateChangeListenerId, pCallback, pUserData);
     env->DeleteLocalRef(dxEndpointClass);
     return new DxStateChangeListener(result);
   }

src/main/c/jni-lib/src/listeners/DxSubscriptionChangeListener.cpp

@@ -18,8 +18,12 @@ namespace dxfeed {
     auto dxEndpointClass = jni::safeFindClass(env, "com/dxfeed/api/DxSubscriptionJni");
     auto newChangeListenerId =
       jni::safeGetStaticMethodID(env, dxEndpointClass, "newChangeListener", "(JJJJ)J");
+    auto pOnSymbolsAdded = dxfeed::r_cast<jlong>(fSymbolsAdded);
+    auto pOnSymbolsRemoved = dxfeed::r_cast<jlong>(fSymbolsRemoved);
+    auto pOnSubscriptionClosed = dxfeed::r_cast<jlong>(fSubscriptionClosed);
+    auto pUserData = dxfeed::r_cast<jlong>(userData);
     auto result = jni::checkedCallStaticLongMethod(env, dxEndpointClass, newChangeListenerId,
-                                                   fSymbolsAdded, fSymbolsRemoved, fSubscriptionClosed, userData);
+                                                   pOnSymbolsAdded, pOnSymbolsRemoved, pOnSubscriptionClosed, pUserData);
     env->DeleteLocalRef(dxEndpointClass);
     return new DxSubscriptionChangeListener(result);
   }