Fixed invalid Win32 installation script.

[crud89]

The issue #355 describes a problem with building OpenEXR from CMake under Windows. Currently, the IlmImf project will be copied into C:/bin/, resulting in an incomplete install.

The problem originates from an invalid usage of the ${OPENEXR_PACKAGE_PREFIX}, which is never set by default and also not exposed to the cmake cache. Assuming this was unintented, replacing it with ${CMAKE_INSTALL_PREFIX} fixes the issue.

The issue only affects Windows builds and the fix should not affect builds for environments different to WIN32.

[hjmallon]

WORKING_DIR is not used anywhere in the CMake project so should be removed.
RUNTIME_DIR is correctly set in OpenEXRSettings.cmake which is fixed as of 26c8619

So this whole section can be removed, which should fix any issues you have.

[crud89]

WORKING_DIR is not used anywhere in the CMake project so should be removed.
RUNTIME_DIR is correctly set in OpenEXRSettings.cmake which is fixed as of 26c8619

So this whole section can be removed, which should fix any issues you have.

Thanks for the reply! I've removed the block and rebuilt the project. Everything works as expected.

[meshula]

Removed the offending chunk, thanks for the report!
737bc29