fix compiler warnings:

- defined but not used
- deprecated conversion from string constant to ‘char*’

code/OgreBinarySerializer.h

@@ -306,6 +306,7 @@ enum MeshChunkId
 		// float extremes [n_extremes][3];
 };
 
+/*
 static std::string MeshHeaderToString(MeshChunkId id)
 {
 	switch(id)
@@ -347,6 +348,7 @@ static std::string MeshHeaderToString(MeshChunkId id)
 	}
 	return "Unknown_MeshChunkId";
 }
+*/
 
 enum SkeletonChunkId
 {
@@ -393,6 +395,7 @@ enum SkeletonChunkId
 		// float scale							: scale to apply to trans/scale keys
 };
 
+/*
 static std::string SkeletonHeaderToString(SkeletonChunkId id)
 {
 	switch(id)
@@ -409,6 +412,7 @@ static std::string SkeletonHeaderToString(SkeletonChunkId id)
 	}
 	return "Unknown_SkeletonChunkId";
 }
+*/
 } // Ogre
 } // Assimp