[fusl] Update fusl

fusl/src/stdio/fread.c

 #include "stdio_impl.h"
 #include <string.h>
 
 #define MIN(a,b) ((a)<(b) ? (a) : (b))
 
 size_t fread(void *restrict destv, size_t size, size_t nmemb, FILE *restrict f)
 {
         unsigned char *dest = destv;
         size_t len = size*nmemb, l = len, k;
+        if (!size) nmemb = 0;
 
         FLOCK(f);
 
         f->mode |= f->mode-1;
 
         if (f->rend - f->rpos > 0) {
                 /* First exhaust the buffer. */
                 k = MIN(f->rend - f->rpos, l);
                 memcpy(dest, f->rpos, k);
                 f->rpos += k;
                 dest += k;
                 l -= k;
         }
         
         /* Read the remainder directly */
         for (; l; l-=k, dest+=k) {
                 k = __toread(f) ? 0 : f->read(f, dest, l);
                 if (k+1<=1) {
                         FUNLOCK(f);
                         return (len-l)/size;
                 }
         }
 
         FUNLOCK(f);
         return nmemb;
 }
 
 weak_alias(fread, fread_unlocked);