service/vi: Implement OpenDefaultDisplay in terms of OpenDisplay

Internally within the vi services, this is essentially all that
OpenDefaultDisplay does, so it's trivial to just do the same, and
forward the default display string into the function.

src/core/hle/service/vi/vi.cpp

@@ -888,10 +888,23 @@ private:
         LOG_WARNING(Service_VI, "(STUBBED) called");
 
         IPC::RequestParser rp{ctx};
-        auto name_buf = rp.PopRaw<std::array<u8, 0x40>>();
-        auto end = std::find(name_buf.begin(), name_buf.end(), '\0');
+        const auto name_buf = rp.PopRaw<std::array<char, 0x40>>();
+
+        OpenDisplayImpl(ctx, std::string_view{name_buf.data(), name_buf.size()});
+    }
+
+    void OpenDefaultDisplay(Kernel::HLERequestContext& ctx) {
+        LOG_DEBUG(Service_VI, "called");
+
+        OpenDisplayImpl(ctx, "Default");
+    }
 
-        std::string name(name_buf.begin(), end);
+    void OpenDisplayImpl(Kernel::HLERequestContext& ctx, std::string_view name) {
+        const auto trim_pos = name.find('\0');
+
+        if (trim_pos != std::string_view::npos) {
+            name.remove_suffix(name.size() - trim_pos);
+        }
 
         ASSERT_MSG(name == "Default", "Non-default displays aren't supported yet");
 
@@ -1082,7 +1095,7 @@ IApplicationDisplayService::IApplicationDisplayService(
          "GetIndirectDisplayTransactionService"},
         {1000, &IApplicationDisplayService::ListDisplays, "ListDisplays"},
         {1010, &IApplicationDisplayService::OpenDisplay, "OpenDisplay"},
-        {1011, nullptr, "OpenDefaultDisplay"},
+        {1011, &IApplicationDisplayService::OpenDefaultDisplay, "OpenDefaultDisplay"},
         {1020, &IApplicationDisplayService::CloseDisplay, "CloseDisplay"},
         {1101, nullptr, "SetDisplayEnabled"},
         {1102, &IApplicationDisplayService::GetDisplayResolution, "GetDisplayResolution"},