Fixed linker error reported by PuMI causing the DLL build to fail.

git-svn-id: https://assimp.svn.sourceforge.net/svnroot/assimp/trunk@200 67173fc5-114c-0410-ac8e-9d2fd5bffc1f

code/SkeletonMeshBuilder.h

@@ -57,7 +57,7 @@ namespace Assimp
  * the resembles the node hierarchy. This is useful for file formats
  * that don't carry any mesh data but only animation data.
  */
-class SkeletonMeshBuilder
+class ASSIMP_API SkeletonMeshBuilder
 {
 public:
   /** The constructor processes the given scene and adds a mesh there. Does nothing

include/assimp.hpp

@@ -73,7 +73,7 @@ namespace Assimp
 
 struct aiScene;
 struct aiFileIO;
-extern "C" const aiScene* aiImportFileEx( const char*, unsigned int, aiFileIO*);
+extern "C" ASSIMP_API const aiScene* aiImportFileEx( const char*, unsigned int, aiFileIO*);
 
 namespace Assimp
 {