警告：赋值使指针从整数开始而没有在malloc进行强制转换（默认情况下启用）

90: if (links->info[links->length-1].paths = malloc(connections*sizeof(char*))==NULL) {
        perror("Malloc failed! Aborting execution\n"); exit(MF);}
for (j=0; j<connections; j++) {
93:    if (links->info[links->length-1].paths[j] = malloc(250*sizeof(char))==NULL) {
    perror("Malloc failed! Aborting execution\n"); exit(MF);}
}

在哪里

 Link *links;
 int connections;
 typedef struct{               //Info of the link
   int inode;                  //I-node
   int prime_inode;            //Corresponding i-node
   int connections;            //Number of hard links
   int next_path;              //Where to put the next path
   char **paths;               //Paths that refer to the i-node
  } Link_info;

typedef struct {
   int length;                 //Number of links
   Link_info *info;            //The array of the link info
}Link;

我得到这些警告

 traverse.c:90:52: warning: assignment makes pointer from integer without a cast [enabled by default]
 traverse.c:93:59: warning: assignment makes pointer from integer without a cast [enabled by default]    

我想制作一个包含“连接数”单元格的字符串数组，每个字符串最多包含250个字符。我想知道这是怎么回事。