HLE: Fix recent DSP change for Visual Studio.

src/audio_core/hle/dsp.h

@@ -33,13 +33,9 @@ namespace HLE {
 // double-buffer. The frame counter is located as the very last u16 of each region and is incremented
 // each audio tick.
 
-struct SharedMemory;
-
 constexpr VAddr region0_base = 0x1FF50000;
 constexpr VAddr region1_base = 0x1FF70000;
 
-extern std::array<SharedMemory, 2> g_regions;
-
 /**
  * The DSP is native 16-bit. The DSP also appears to be big-endian. When reading 32-bit numbers from
  * its memory regions, the higher and lower 16-bit halves are swapped compared to the little-endian
@@ -507,6 +503,8 @@ struct SharedMemory {
 };
 ASSERT_DSP_STRUCT(SharedMemory, 0x8000);
 
+extern std::array<SharedMemory, 2> g_regions;
+
 // Structures must have an offset that is a multiple of two.
 static_assert(offsetof(SharedMemory, frame_counter) % 2 == 0, "Structures in DSP::HLE::SharedMemory must be 2-byte aligned");
 static_assert(offsetof(SharedMemory, source_configurations) % 2 == 0, "Structures in DSP::HLE::SharedMemory must be 2-byte aligned");