Fix: Removing double delete of texture items.

Textures were being double deleted after a merge scene because the
texture array wasn't being properly deleted at the end of merging.
Furthermore, the texture array was being sized to the number of
materials instead of the number of textures.

code/Common/SceneCombiner.cpp

@@ -45,7 +45,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 // possible as new fields are added to assimp structures.
 
 // ----------------------------------------------------------------------------
-/** 
+/**
   * @file Implements Assimp::SceneCombiner. This is a smart utility
   *       class that combines multiple scenes, meshes, ... into one. Currently
   *       these utilities are used by the IRR and LWS loaders and the
@@ -359,7 +359,7 @@ void SceneCombiner::MergeScenes(aiScene **_dest, aiScene *master, std::vector<At
 
     // generate the output texture list + an offset table for all texture indices
     if (dest->mNumTextures) {
-        aiTexture **pip = dest->mTextures = new aiTexture *[dest->mNumMaterials];
+        aiTexture **pip = dest->mTextures = new aiTexture *[dest->mNumTextures];
         cnt = 0;
         for (unsigned int n = 0; n < src.size(); ++n) {
             SceneHelper *cur = &src[n];
@@ -638,6 +638,8 @@ void SceneCombiner::MergeScenes(aiScene **_dest, aiScene *master, std::vector<At
         deleteMe->mMaterials = nullptr;
         delete[] deleteMe->mAnimations;
         deleteMe->mAnimations = nullptr;
+        delete[] deleteMe->mTextures;
+        deleteMe->mTextures = nullptr;
 
         deleteMe->mRootNode = nullptr;