added LRU and fixed bug in dequeueN

lib/api/api.c

@@ -666,6 +666,15 @@ int writeFile(const char* pathname, const char* dirname) {
 	    }
 	}
     }
+    freeResponse(res);
+    free(res);
+    res = calloc(1, sizeof(response_t));
+    if(!res){
+	perror("writeFile: calloc");
+	free(content);
+	free(cmd);
+	return -1;
+    }
 
     /* send file to server */
     if (writen(fd_skt, content, size) == -1) {
@@ -677,7 +686,6 @@ int writeFile(const char* pathname, const char* dirname) {
 	return -1;
     }
 
-
     /* reciveData(, 0) because if we get a MEOK we don't expect files */
     if(reciveData(res, 0) < 0) {
 	/* errno is set by reciveData */