Issue-1169: fix travis build.

include/assimp/vector3.h

@@ -51,7 +51,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #   include <math.h>
 #endif
 
-#include "./Compiler/pushpack1.h"
+//#include "./Compiler/pushpack1.h"
 #include "defs.h"
 
 #ifdef __cplusplus
@@ -132,7 +132,7 @@ public:
 		}; 
 	};*/
     TReal x, y, z;
-} PACK_STRUCT;
+} /*PACK_STRUCT*/;
 
 
 typedef aiVector3t<ai_real> aiVector3D;
@@ -141,11 +141,11 @@ typedef aiVector3t<ai_real> aiVector3D;
 
 struct aiVector3D {
     ai_real x, y, z;
-} PACK_STRUCT;
+} /*PACK_STRUCT*/;
 
 #endif // __cplusplus
 
-#include "./Compiler/poppack1.h"
+//#include "./Compiler/poppack1.h"
 
 #ifdef __cplusplus