Fixed MinGW compilation error in jp2image.cpp u_int32_t not defined (in stdint.h/Linux, types.h/Mac)

This is an unexpected new defect as MinGW has previously build OK.

src/types.hpp

@@ -39,6 +39,12 @@
 # include "exv_conf.h"
 #endif
 
+#if defined(__MINGW32__) || defined(__MINGW64__)
+# ifndef  __MINGW__
+#  define __MINGW__
+# endif
+#endif
+
 #include "version.hpp"
 
 // + standard includes
@@ -68,6 +74,13 @@ typedef __int64          int64_t;
 # define EXV_WIDEN(t) L ## t
 #endif
 
+#ifdef  __MINGW__
+typedef	unsigned char		u_int8_t;
+typedef	unsigned short		u_int16_t;
+typedef	unsigned int		u_int32_t;
+typedef	unsigned long long	u_int64_t;
+#endif
+
 /*!
   @brief Macro to make calls to member functions through a pointer more readable.
          See the C++ FAQ LITE, item

src/version.cpp

@@ -37,12 +37,6 @@ EXIV2_RCSID("@(#) $Id$")
 # include "exv_conf.h"
 #endif
 
-#if defined(__MINGW32__) || defined(__MINGW64__)
-# ifndef  __MINGW__
-#  define __MINGW__
-# endif
-#endif
-
 #if defined(__CYGWIN__) || defined(__MINGW__)
 #include <windows.h>
 #endif