SDL2: Config.cpp fix double to float warning

src/citra/config.cpp

@@ -63,7 +63,8 @@ void Config::ReadValues() {
     // Renderer
     Settings::values.use_hw_renderer = sdl2_config->GetBoolean("Renderer", "use_hw_renderer", true);
     Settings::values.use_shader_jit = sdl2_config->GetBoolean("Renderer", "use_shader_jit", true);
-    Settings::values.resolution_factor = sdl2_config->GetReal("Renderer", "resolution_factor", 1.0);
+    Settings::values.resolution_factor =
+        (float)sdl2_config->GetReal("Renderer", "resolution_factor", 1.0);
     Settings::values.use_vsync = sdl2_config->GetBoolean("Renderer", "use_vsync", false);
     Settings::values.toggle_framelimit =
         sdl2_config->GetBoolean("Renderer", "toggle_framelimit", true);