opencv: Use cv::AutoBuffer<>::data()

modules/core/src/persistence_cpp.cpp

@@ -222,7 +222,7 @@ String FileStorage::getDefaultObjectName(const String& _filename)
     if( ptr == ptr2 )
         CV_Error( CV_StsBadArg, "Invalid filename" );
 
-    char* name = name_buf;
+    char* name = name_buf.data();
 
     // name must start with letter or '_'
     if( !cv_isalpha(*ptr) && *ptr!= '_' ){
@@ -237,7 +237,7 @@ String FileStorage::getDefaultObjectName(const String& _filename)
         *name++ = c;
     }
     *name = '\0';
-    name = name_buf;
+    name = name_buf.data();
     if( strcmp( name, "_" ) == 0 )
         strcpy( name, stubname );
     return String(name);