Add explanatory comment about fitting into a size_t.
@@ -207,6 +207,8 @@ int EVP_PBE_scrypt(const char *pass, size_t passlen,
if (maxmem == 0)
maxmem = SCRYPT_MAX_MEM;
+
+ /* Check that the maximum memory doesn't exceed a size_t limits */
if (maxmem > SIZE_MAX)
maxmem = SIZE_MAX;
