Bugfix: Use HASH_ADD_KEYPTR for const char *, not HASH_ADD_STR

miner.c

@@ -1037,7 +1037,7 @@ struct mining_goal_info *get_mining_goal(const char * const name)
 			.blkchain = blkchain,
 			.current_diff = 0xFFFFFFFFFFFFFFFFULL,
 		};
-		HASH_ADD_STR(mining_goals, name, goal);
+		HASH_ADD_KEYPTR(hh, mining_goals, goal->name, strlen(goal->name), goal);
 		HASH_SORT(mining_goals, mining_goals_name_cmp);
 		
 #ifdef HAVE_CURSES