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/core/include/opencv2/core/private.hpp

@@ -128,12 +128,17 @@ namespace cv
 } //namespace cv
 
 #define CV_INIT_ALGORITHM(classname, algname, memberinit) \
-    static ::cv::Algorithm* create##classname##_hidden() \
+    static inline ::cv::Algorithm* create##classname##_hidden() \
     { \
         return new classname; \
     } \
     \
-    static ::cv::AlgorithmInfo& classname##_info() \
+    static inline ::cv::Ptr< ::cv::Algorithm> create##classname##_ptr_hidden() \
+    { \
+        return ::cv::makePtr<classname>(); \
+    } \
+    \
+    static inline ::cv::AlgorithmInfo& classname##_info() \
     { \
         static ::cv::AlgorithmInfo classname##_info_var(algname, create##classname##_hidden); \
         return classname##_info_var; \