fixes #40

Author: Calvin1602

external/assimp-3.0.1270/include/assimp/types.h

@@ -50,6 +50,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #include <memory.h>
 #include <math.h>
 #include <stddef.h>
+#include <string.h>
 
 // Our compile configuration
 #include "defs.h"