Fix use of FindIgnOGRE2 on Windows if OGRE2 is not found #94
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If a library is not found, a
Find<package>.cmake
should fail by setting<package>_FOUND
toFALSE
, not make the CMake configuration exit with a fatal error usingmessage(FATAL_ERROR ...)
.This change fixes the compilation of ignition-rendering on Windows when
OGRE2
/ogre-next
is not installed.