Remove '#include <sys/stat.h>' from FL/platform_types.h

- Add this include statement only where needed.
- Rename Fl_System_Driver::stat() to flstat().

This fixes an issue when using some (!) MinGW 64-bit build systems
that obviously '#define stat _stat64' or similar. This would
result in compiler problems if 'stat()' is a member function of
Fl_System_Driver.

FL/fl_utf8.h

@@ -29,7 +29,8 @@
 
 #include "Fl_Export.H"
 #include "fl_types.h"
-#include <stdio.h>   // FILE *fl_fopen()
+#include <stdio.h>      // FILE *fl_fopen()
+#include <sys/stat.h>   // struct stat
 
 #ifdef __cplusplus
 extern "C" {

FL/platform_types.h

@@ -90,7 +90,6 @@ typedef int FL_SOCKET;
   typedef class NSOpenGLContext* GLContext;
 #endif /* __OBJC__ */
 
-#include <sys/stat.h>
 #include <sys/types.h>
 #include <dirent.h>
 #  define FL_COMMAND    FL_META
@@ -106,7 +105,6 @@ typedef  unsigned __int64 FL_SOCKET;    /* *FIXME* - FL_SOCKET (see above) */
 typedef  int FL_SOCKET;
 # endif
 typedef struct HGLRC__ *GLContext;
-#include <sys/stat.h>
 #ifdef __MINGW32__
 #  include <dirent.h>
 #else
@@ -119,7 +117,6 @@ typedef struct flCairoRegion* Fl_Region;
 typedef int FL_SOCKET; /**< socket or file descriptor */
 typedef void *EGLContext;
 typedef EGLContext GLContext;
-#include <sys/stat.h>
 #include <sys/types.h>
 #include <dirent.h>
 
@@ -129,7 +126,6 @@ typedef unsigned long Fl_Offscreen;
 typedef struct _XRegion *Fl_Region;
 typedef int FL_SOCKET;
 typedef struct __GLXcontextRec *GLContext;
-#include <sys/stat.h>
 #include <sys/types.h>
 #include <dirent.h>
 

src/Fl_System_Driver.H

@@ -112,7 +112,7 @@ public:
   virtual int execvp(const char * /*file*/, char *const * /*argv*/) {return -1;}
   virtual int chmod(const char* /*f*/, int /*mode*/) {return -1;}
   virtual int access(const char* /*f*/, int /*mode*/) { return -1;}
-  virtual int stat(const char* /*f*/, struct stat *) { return -1;}
+  virtual int flstat(const char* /*f*/, struct stat *) { return -1;}
   virtual char *getcwd(char* /*b*/, int /*l*/) {return NULL;}
   virtual int chdir(const char*) {return -1;}
   virtual int unlink(const char*) {return -1;}

src/drivers/WinAPI/Fl_WinAPI_System_Driver.H

@@ -54,7 +54,7 @@ public:
   virtual int execvp(const char *file, char *const *argv);
   virtual int chmod(const char *fnam, int mode);
   virtual int access(const char *fnam, int mode);
-  virtual int stat(const char *fnam, struct stat *b);
+  virtual int flstat(const char *fnam, struct stat *b);
   virtual char *getcwd(char *b, int l);
   virtual int chdir(const char *path);
   virtual int unlink(const char *fnam);

src/drivers/WinAPI/Fl_WinAPI_System_Driver.cxx

@@ -243,7 +243,7 @@ int Fl_WinAPI_System_Driver::access(const char *fnam, int mode) {
   return _waccess(utf8_to_wchar(fnam, wbuf), mode);
 }
 
-int Fl_WinAPI_System_Driver::stat(const char *fnam, struct stat *b) {
+int Fl_WinAPI_System_Driver::flstat(const char *fnam, struct stat *b) {
 
   // remove trailing '/' or '\'
   unsigned len = (unsigned)strlen(fnam);

src/fl_utf8.cxx

@@ -3,7 +3,7 @@
 //
 // Author: Jean-Marc Lienher ( http://oksid.ch )
 // Copyright 2000-2010 by O'ksi'D.
-// Copyright 2016-2020 by Bill Spitzak and others.
+// Copyright 2016-2022 by Bill Spitzak and others.
 //
 // This library is free software. Distribution and use rights are outlined in
 // the file "COPYING" which should have been included with this file.  If this
@@ -462,7 +462,7 @@ int fl_access(const char* f, int mode) {
   \return    the return value of _wstat() on Windows or stat() on other platforms.
 */
 int fl_stat(const char* f, struct stat *b) {
-  return Fl::system_driver()->stat(f, b);
+  return Fl::system_driver()->flstat(f, b);
 }
 
 /** Cross-platform function to change the current working directory,