Compile fix (no unity bulid): missing AZ namespace. (#685)

Signed-off-by: Joerg H. Mueller <[email protected]>

Gem/Code/Source/ProceduralSkinnedMesh.cpp

@@ -13,6 +13,8 @@
 
 const uint32_t maxInfluencesPerVertex = 4;
 
+using namespace AZ;
+
 namespace AtomSampleViewer
 {
     void ProceduralSkinnedMesh::Resize(SkinnedMeshConfig& skinnedMeshConfig)