Fix build exclude define in BlenderScene.cpp, fixes #205

code/BlenderScene.cpp

@@ -42,7 +42,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *  @brief MACHINE GENERATED BY ./scripts/BlenderImporter/genblenddna.py
  */
 #include "AssimpPCH.h"
-#ifndef AI_BUILD_NO_BLEND_IMPORTER
+#ifndef ASSIMP_BUILD_NO_BLEND_IMPORTER
 
 #include "BlenderDNA.h"
 #include "BlenderScene.h"