Issue: 937.  Thanks to Alan for the patch.

git-svn-id: svn://dev.exiv2.org/svn@3213 b7c8b350-86e7-0310-a4b4-de8f6a8f16a3
Issue: #940.  Fix compilation warnings.

git-svn-id: svn://dev.exiv2.org/svn@3214 b7c8b350-86e7-0310-a4b4-de8f6a8f16a3
Issue: #940.  Changes to eliminate compiler warnings with GCC 4.8.1.2 on Linux.

git-svn-id: svn://dev.exiv2.org/svn@3215 b7c8b350-86e7-0310-a4b4-de8f6a8f16a3
Issue: 940.  Compiler warnings.  Really should fix the mess concerning str_error_r in autotools and CMake in the config directory.

git-svn-id: svn://dev.exiv2.org/svn@3216 b7c8b350-86e7-0310-a4b4-de8f6a8f16a3
Issue: 940.  More changes for GCC 4.8.1.2

git-svn-id: svn://dev.exiv2.org/svn@3217 b7c8b350-86e7-0310-a4b4-de8f6a8f16a3
Issue: 940.  Simplified (and hopefully final) fix.

git-svn-id: svn://dev.exiv2.org/svn@3218 b7c8b350-86e7-0310-a4b4-de8f6a8f16a3
MSVC build environment: Added casiomn.cpp (thanks Niels for adding the Casio code).

git-svn-id: svn://dev.exiv2.org/svn@3219 b7c8b350-86e7-0310-a4b4-de8f6a8f16a3