message: Fix cmake syntax error
diff: @@ -39,7 +39,7 @@ function(visionaray_use_package name)
  if(NOT pkg_LIBS)
  if(${name}_LIBRARIES)
  set(pkg_LIBS ${${name}_LIBRARIES})
  - elseif(${upper_name}_LIBRARIES})
  + elseif(${upper_name}_LIBRARIES)
  set(pkg_LIBS ${${upper_name}_LIBRARIES})
  elseif(${name}_LIBRARY)
  set(pkg_LIBS ${${name}_LIBRARY})
  