os_support: Choose between direct.h and io.h using a configure check

Signed-off-by: Martin Storsjö <martin@martin.st>

configure

@@ -1132,6 +1132,7 @@ HAVE_LIST="
     dev_ic_bt8xx_h
     dev_video_bktr_ioctl_bt848_h
     dev_video_meteor_ioctl_meteor_h
+    direct_h
     dlfcn_h
     dlopen
     dos_paths
@@ -3175,6 +3176,7 @@ check_func_headers windows.h MapViewOfFile
 check_func_headers windows.h Sleep
 check_func_headers windows.h VirtualAlloc
 
+check_header direct.h
 check_header dlfcn.h
 check_header dxva.h
 check_header dxva2api.h

libavformat/os_support.h

@@ -39,10 +39,10 @@
 #endif /* defined(__MINGW32__) && !defined(__MINGW32CE__) */
 
 #ifdef _WIN32
-#ifdef __MINGW32CE__
-#include <io.h>
-#else
+#if HAVE_DIRECT_H
 #include <direct.h>
+#elif HAVE_IO_H
+#include <io.h>
 #endif
 #define mkdir(a, b) _mkdir(a)
 #else