BUG: don't fail with FATAL_ERROR if REQUIRED was not used

Alex

Modules/FindOpenSSL.cmake

@@ -33,7 +33,8 @@ IF(WIN32 AND MSVC)
       IF(SSL_EAY_DEBUG AND SSL_EAY_RELEASE)
          SET(OPENSSL_LIBRARIES optimized ${SSL_EAY_RELEASE} debug ${SSL_EAY_DEBUG})
       ELSE(SSL_EAY_DEBUG AND SSL_EAY_RELEASE)
-         MESSAGE(FATAL_ERROR "Could not find the debug and release version of openssl")
+         SET(OPENSSL_LIBRARIES NOTFOUND)
+         MESSAGE(STATUS "Could not find the debug and release version of openssl")
       ENDIF(SSL_EAY_DEBUG AND SSL_EAY_RELEASE)
    ELSE(MSVC_IDE)
       STRING(TOLOWER ${CMAKE_BUILD_TYPE} CMAKE_BUILD_TYPE_TOLOWER)