fix: use "cvAlloc" wrapper function for malloc.

modules/core/src/persistence.cpp

@@ -4855,7 +4855,7 @@ cvRegisterType( const CvTypeInfo* _info )
             "Type name should contain only letters, digits, - and _" );
     }
 
-    info = (CvTypeInfo*)malloc( sizeof(*info) + len + 1 );
+    info = (CvTypeInfo*)cvAlloc( sizeof(*info) + len + 1 );
 
     *info = *_info;
     info->type_name = (char*)(info + 1);
@@ -4893,7 +4893,7 @@ cvUnregisterType( const char* type_name )
         if( !CvType::first || !CvType::last )
             CvType::first = CvType::last = 0;
 
-        free( info );
+        cvFree( info );
     }
 }