LWO: use forward declaration in header.

code/LWOAnimation.cpp

@@ -54,6 +54,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 // internal headers
 #include "LWOFileData.h"
+#include <assimp/anim.h>
 
 using namespace Assimp;
 using namespace Assimp::LWO;

code/LWOAnimation.h

@@ -48,11 +48,12 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #ifndef AI_LWO_ANIMATION_INCLUDED
 #define AI_LWO_ANIMATION_INCLUDED
 
-#include <assimp/anim.h>
+//
 #include <vector>
 #include <list>
 
 struct aiNodeAnim;
+struct aiVectorKey;
 
 namespace Assimp {
 namespace LWO {
@@ -166,7 +167,6 @@ struct Envelope
     //! Keyframes for this envelope
     std::vector<Key> keys;
 
-
     // temporary data for AnimResolver
     size_t old_first,old_last;
 };
@@ -198,8 +198,7 @@ public:
      *  @param Output tick rate, per second
      *  @note The input envelopes are possibly modified.
      */
-    AnimResolver(std::list<Envelope>& envelopes,
-        double tick);
+    AnimResolver(std::list<Envelope>& envelopes, double tick);
 
 public: