try to fix 死锁

dict.h

@@ -95,7 +95,7 @@ static int init_dict(char* file_path, pthread_rwlock_t* mu) {
 
 static FILE* open_dict(uint8_t lock_type, uint32_t index, pthread_rwlock_t* mu) {
     if(lock_type & DICT_LOCK_EX) {
-        if(pthread_rwlock_trywrlock(mu)) {
+        if(pthread_rwlock_wrlock(mu)) {
             puts("Open dict: Writelock busy");
             return NULL;
         }

server.c

@@ -435,7 +435,7 @@ static void handle_int(int signo) {
 }
 
 static void handle_pipe(int signo) {
-    fprintf(stderr, "Pipe error: %d\n", signo);
+    puts("Pipe error, exit thread...");
     pthread_exit(NULL);
 }