The tty_operation chars_in_buffer() is not allowed to return a negative
value to signal an error. Corrects the problem flagged by commit
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| act2000 | ||
| capi | ||
| divert | ||
| gigaset | ||
| hardware | ||
| hisax | ||
| hysdn | ||
| i4l | ||
| icn | ||
| isdnloop | ||
| mISDN | ||
| pcbit | ||
| sc | ||
| Kconfig | ||
| Makefile | ||