a warning in ios-dev-stream.c

[Bruno Haible]

Gcc gives me a warning:

ios-dev-stream.c: In function 'ios_dev_stream_pread':
ios-dev-stream.c:184:7: warning: ignoring return value of 'fread', declared 
with attribute warn_unused_result [-Wunused-result]
       fread (temp, to_be_read, 1, sio->file);
       ^

I think the warning is justified: If someone truncates the file just before
the fread() call happens, fread() will read nothing, and the following
ios_buffer_pwrite() call will write an uninitialized value?

Bruno