remove AssimpPCH.h: fixes #534

code/IFCMaterial.cpp

@@ -42,11 +42,12 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *  @brief Implementation of conversion routines to convert IFC materials to aiMaterial
  */
 
-#include "AssimpPCH.h"
+
 
 #ifndef ASSIMP_BUILD_NO_IFC_IMPORTER
 #include "IFCUtil.h"
 #include <limits>
+#include "../include/assimp/material.h"
 
 namespace Assimp {
 	namespace IFC {