metal: do not release null mtl textures

src/video_core/renderer_metal/mtl_graphics_pipeline.cpp

@@ -15,6 +15,7 @@
 #include "video_core/renderer_metal/mtl_command_recorder.h"
 #include "video_core/renderer_metal/mtl_device.h"
 #include "video_core/shader_notify.h"
+#include "video_core/texture_cache/texture_cache.h"
 #include "video_core/texture_cache/texture_cache_base.h"
 
 namespace Metal {

src/video_core/renderer_metal/mtl_pipeline_cache.cpp

@@ -266,7 +266,7 @@ std::unique_ptr<GraphicsPipeline> PipelineCache::CreateGraphicsPipeline(
     // HACK: dummy info
     std::array<const Shader::Info*, VideoCommon::NUM_STAGES> infos = {nullptr};
     infos[0] = new Shader::Info{};
-    infos[1] = new Shader::Info{};
+    infos[4] = new Shader::Info{};
 
     return std::make_unique<GraphicsPipeline>(device, command_recorder, key, buffer_cache,
                                               texture_cache, &shader_notify, functions, infos);

src/video_core/renderer_metal/mtl_texture_cache.cpp

@@ -103,9 +103,9 @@ ImageView::ImageView(TextureCacheRuntime& runtime, const VideoCommon::ImageViewI
                      ImageId image_id_, Image& image)
     : VideoCommon::ImageViewBase{info, image.info, image_id_, image.gpu_addr} {
     using Shader::TextureType;
-    // TODO: For whatever reason, some images's internal objc objects is NULL
-    // TODO: metal-cpp provides no method to check for this
-    texture = image.GetHandle()->retain();
+    if (image.GetHandle()) {
+        texture = image.GetHandle()->retain();
+    }
 
     // TODO: create texture view
 }
@@ -128,7 +128,9 @@ ImageView::ImageView(TextureCacheRuntime& runtime, const VideoCommon::NullImageV
 }
 
 ImageView::~ImageView() {
-    texture->release();
+    if (texture) {
+        texture->release();
+    }
 }
 
 Sampler::Sampler(TextureCacheRuntime& runtime, const Tegra::Texture::TSCEntry& tsc) {