write(2)-errors to /dev/lirc are not transmitted to Java

JNIEXPORT void JNICALL Java_org_harctoolbox_devslashlirc_Mode2LircDevice_sendNative(....) returns void, may be enough to change to jboolean.

The following signals is too long (?), and fails silently using IrScrutinizer

0000 006C 002A 0000 015B 00AD 0016 0016 0016 0041 0016 0016 0016 0041 0016 0041 0016 0041 0016 0041 0016 0016 0016 0041 0016 0016 0016 0041 0016 0016 0016 0016 0016 0016 0016 0016 0016 0041 0016 0041 0016 0041 0016 0016 0016 0041 0016 0041 0016 0016 0016 0016 0016 0016 0016 0016 0016 0016 0016 0041 0016 0016 0016 0016 0016 0041 0016 0041 0016 0041 0016 05F7 015B 0057 0016 0E6C 015B 0057 0016 0E6C 015B 0057 0016 0E6C 015B 0057 0016 0E6C

Start at the JNI entry point Java_org_harctoolbox_devslashlirc_Mode2LircDevice_sendNative and inspect its Java caller and native write path. Reproduce the supplied long signal through IrScrutinizer, then verify that write(2) failures from /dev/lirc are reported to Java rather than failing silently.

Written by the indexing model from the issue text.