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/ml/src/ml_init.cpp

@@ -56,7 +56,7 @@ CV_INIT_ALGORITHM(EM, "StatModel.EM",
 
 bool initModule_ml(void)
 {
-    Ptr<Algorithm> em = createEM_hidden();
+    Ptr<Algorithm> em = createEM_ptr_hidden();
     return em->info() != 0;
 }