Check return value from mkdir

If mkdir fails, no need to stat.

Fixes CID 1039963

src/bin/e_ipc.c

@@ -55,7 +55,8 @@ e_ipc_init(void)
         
         snprintf(buf, sizeof(buf), "%s/e-%s@%x",
                  base, user, id1);
-        mkdir(buf, S_IRWXU);
+        if (mkdir(buf, S_IRWXU) < 0)
+          goto retry;
         if (stat(buf, &st) == 0)
           {
              if ((st.st_uid == getuid()) &&
@@ -69,6 +70,7 @@ e_ipc_init(void)
                   if (_e_ipc_server) break;
                }
           }
+retry:
         id1 = rand();
      }
    if (!_e_ipc_server) return 0;