Ported to updated libjpeg-turbo from
https://github.com/msys2/MINGW-packages/blob/master/mingw-w64-libjpeg-turbo/jpeg-typedefs.patch
--- a/src/jmorecfg.h
+++ b/src/jmorecfg.h
@@ -200,6 +200,13 @@
  */
 
 #ifndef HAVE_BOOLEAN
+#if defined(_WIN32) && !defined(HAVE_BOOLEAN)
+#ifndef __RPCNDR_H__
+typedef unsigned char boolean;
+#endif
+#define HAVE_BOOLEAN
+#endif
+#if !defined(HAVE_BOOLEAN) && !defined(__RPCNDR_H__)
 typedef int boolean;
 #endif
 #ifndef FALSE                   /* in case these macros already exist */