Shuffle some declarations around in core headers

src/emu/emucore.h

@@ -98,6 +98,9 @@ using util::DWORD_XOR_BE;
 using util::DWORD_XOR_LE;
 
 
+// input ports support up to 32 bits each
+typedef u32 ioport_value;
+
 // pen_t is used to represent pixel values in bitmaps
 typedef u32 pen_t;
 

src/emu/emufwd.h

@@ -187,6 +187,7 @@ class running_machine;
 
 // declared in mconfig.h
 namespace emu::detail { class machine_config_replace; }
+struct internal_layout;
 class machine_config;
 
 // declared in natkeyboard.h

src/emu/ioport.h

@@ -32,9 +32,6 @@
 //  CONSTANTS
 //**************************************************************************
 
-// input ports support up to 32 bits each
-typedef u32 ioport_value;
-
 // active high/low values for input ports
 constexpr ioport_value IP_ACTIVE_HIGH = 0x00000000;
 constexpr ioport_value IP_ACTIVE_LOW = 0xffffffff;

src/emu/rendutil.h

@@ -15,6 +15,8 @@
 
 #include "rendertypes.h"
 
+#include "utilfwd.h"
+
 #include <algorithm>
 #include <cmath>
 #include <utility>