Added to CV_INIT_ALGORITHM a Ptr creation function, for convenience.

Also changed the static functions to inline, to stop GCC complaining
about unused functions.

modules/contrib/src/facerec.cpp

@@ -894,7 +894,7 @@ CV_INIT_ALGORITHM(LBPH, "FaceRecognizer.LBPH",
 
 bool initModule_contrib()
 {
-    Ptr<Algorithm> efaces = createEigenfaces_hidden(), ffaces = createFisherfaces_hidden(), lbph = createLBPH_hidden();
+    Ptr<Algorithm> efaces = createEigenfaces_ptr_hidden(), ffaces = createFisherfaces_ptr_hidden(), lbph = createLBPH_ptr_hidden();
     return efaces->info() != 0 && ffaces->info() != 0 && lbph->info() != 0;
 }