added getter for camera in deferredpipeline

src/deferredpipeline.h

@@ -61,6 +61,7 @@ public:
     DeferredPipeline();
     
     void setCamera(Camera *camera) { m_camera = camera; }
+    Camera* getCamera() { return m_camera;}
     void setSources(ShaderSource *gBufferSource, ShaderSource *lightingSource, ShaderSource *guiSource, Shader *postEffectsShader);
     void setRenderTarget(const FrameBuffer *fbo) { m_renderTarget = fbo; }
     void setSkybox(Texture* texture);