CDImage: Fix compilation on Linux

src/common/cd_image.cpp

@@ -396,7 +396,7 @@ bool CDImage::GenerateSubChannelQ(SubChannelQ* subq, LBA lba)
 
 void CDImage::GenerateSubChannelQ(SubChannelQ* subq, const Index& index, u32 index_offset)
 {
-  subq->control.bits = index.control.bits;
+  subq->control_bits = index.control.bits;
   subq->track_number_bcd =
     (index.track_number <= m_tracks.size() ? BinaryToBCD(index.track_number) : index.track_number);
   subq->index_number_bcd = BinaryToBCD(index.index_number);

src/common/cd_image.h

@@ -145,7 +145,7 @@ public:
 
     struct
     {
-      Control control;
+      u8 control_bits;
       u8 track_number_bcd;
       u8 index_number_bcd;
       u8 relative_minute_bcd;
@@ -162,6 +162,9 @@ public:
 
     static u16 ComputeCRC(const Data& data);
 
+    Control GetControl() const { return Control{control_bits}; }
+    bool IsData() const { return GetControl().data; }
+
     bool IsCRCValid() const;
 
     SubChannelQ& operator=(const SubChannelQ& q)

src/core/cdrom.cpp

@@ -1745,7 +1745,7 @@ bool CDROM::CompleteSeek()
                    subq.absolute_frame_bcd == seek_ff);
       if (seek_okay)
       {
-        if (subq.control.data)
+        if (subq.IsData())
         {
           if (logical)
           {
@@ -1969,7 +1969,7 @@ void CDROM::DoSectorRead()
     return;
   }
 
-  const bool is_data_sector = subq.control.data;
+  const bool is_data_sector = subq.IsData();
   if (!is_data_sector)
   {
     if (m_play_track_number_bcd == 0)