Move Mac-only implementation details out of header file

src/FileFormats.cpp

@@ -260,6 +260,16 @@ wxString sf_normalize_name(const char *name)
 
 #define NUM_HEADERS 13
 
+//
+// Mac OS 4-char type
+//
+
+# ifdef __UNIX__
+#  include <CoreServices/CoreServices.h>
+# else
+#  include <Types.h>
+# endif
+
 OSType MacNames[NUM_HEADERS] = {
    'WAVE', // WAVE
    'AIFF', // AIFF
@@ -276,7 +286,7 @@ OSType MacNames[NUM_HEADERS] = {
    'MAT5', // ?? Matlab 5
 };
 
-OSType sf_header_mactype(int format)
+static OSType sf_header_mactype(int format)
 {
    if (format >= 0x10000)
       return MacNames[(format/0x10000)-1];

src/FileFormats.h

@@ -101,20 +101,6 @@ extern FileExtensions sf_get_all_extensions();
 
 wxString sf_normalize_name(const char *name);
 
-//
-// Mac OS 4-char type
-//
-
-#ifdef __WXMAC__
-# ifdef __UNIX__
-#  include <CoreServices/CoreServices.h>
-# else
-#  include <Types.h>
-# endif
-
-OSType sf_header_mactype(int format);
-#endif
-
 // This function wrapper uses a mutex to serialize calls to the SndFile library.
 #include "MemoryX.h"
 #include "ondemand/ODTaskThread.h"