Add more checks

src/video_core/buffer_cache/buffer_cache.h

@@ -813,14 +813,18 @@ void BufferCache<P>::BindHostGraphicsUniformBuffer(size_t stage, u32 index, u32
                     runtime.BindFastUniformBuffer(stage, binding_index, size);
                 }
                 const auto span = ImmediateBufferWithData(device_addr, size);
-                runtime.PushFastUniformBuffer(stage, binding_index, span);
+                if (!span.empty()) {
+                    runtime.PushFastUniformBuffer(stage, binding_index, span);
+                }
                 return;
             }
         }
         channel_state->fast_bound_uniform_buffers[stage] |= 1u << binding_index;
         channel_state->uniform_buffer_binding_sizes[stage][binding_index] = size;
         const std::span<u8> span = runtime.BindMappedUniformBuffer(stage, binding_index, size);
-        device_memory.ReadBlockUnsafe(device_addr, span.data(), size);
+        if (!span.empty()) {
+            device_memory.ReadBlockUnsafe(device_addr, span.data(), size);
+        }
         return;
     }
     // Classic cached path