Scanf %m character sequence unable to read strings

[maska989]

*Problem occurs when %m is used with other conversion specifiers

Tested between ia32-generic and host-generic

• Code to reproduction:

  
  #include <stdio.h>

int main(void) { char *str; sscanf("abc", "%ms", &str); printf("\n%s\n", str);

sscanf("abc", "%m[^c]", &str);
printf("\n%s\n", str);

}

* Outcome between ia32-generic and host-generic
![Screenshot from 2023-03-23 11-27-59](https://user-images.githubusercontent.com/49757239/227175654-3517b120-79eb-4dfe-9915-738cad587b5d.png)

[maska989]

https://github.com/phoenix-rtos/phoenix-rtos-tests/blob/c13ef424dff7c1f0f88f02e4a67104f6d9ed5d22/libc/stdio_scanf.c#L4298 https://github.com/phoenix-rtos/phoenix-rtos-tests/blob/c13ef424dff7c1f0f88f02e4a67104f6d9ed5d22/libc/stdio_scanf.c#L4362 https://github.com/phoenix-rtos/phoenix-rtos-tests/blob/c13ef424dff7c1f0f88f02e4a67104f6d9ed5d22/libc/stdio_scanf.c#L4455