acc: Stub GetUserCount. (#973)

- Used by Pokken Tournament DX.

src/core/hle/service/acc/acc.cpp

@@ -119,6 +119,13 @@ private:
     }
 };
 
+void Module::Interface::GetUserCount(Kernel::HLERequestContext& ctx) {
+    LOG_WARNING(Service_ACC, "(STUBBED) called");
+    IPC::ResponseBuilder rb{ctx, 3};
+    rb.Push(RESULT_SUCCESS);
+    rb.Push<u32>(1);
+}
+
 void Module::Interface::GetUserExistence(Kernel::HLERequestContext& ctx) {
     LOG_WARNING(Service_ACC, "(STUBBED) called");
     IPC::ResponseBuilder rb{ctx, 3};

src/core/hle/service/acc/acc.h

@@ -14,6 +14,7 @@ public:
     public:
         explicit Interface(std::shared_ptr<Module> module, const char* name);
 
+        void GetUserCount(Kernel::HLERequestContext& ctx);
         void GetUserExistence(Kernel::HLERequestContext& ctx);
         void ListAllUsers(Kernel::HLERequestContext& ctx);
         void ListOpenUsers(Kernel::HLERequestContext& ctx);

src/core/hle/service/acc/acc_u0.cpp

@@ -8,7 +8,7 @@ namespace Service::Account {
 
 ACC_U0::ACC_U0(std::shared_ptr<Module> module) : Module::Interface(std::move(module), "acc:u0") {
     static const FunctionInfo functions[] = {
-        {0, nullptr, "GetUserCount"},
+        {0, &ACC_U0::GetUserCount, "GetUserCount"},
         {1, &ACC_U0::GetUserExistence, "GetUserExistence"},
         {2, &ACC_U0::ListAllUsers, "ListAllUsers"},
         {3, &ACC_U0::ListOpenUsers, "ListOpenUsers"},