[sane-devel] [patch] use of gcc format attribute

[Frank Zago]

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This patch allow to detect errors in DBG macros format.
eg:
      DBG (1,
	   "sane_open: device %s not found, trying to register it
anyway\n");

gives --> net.c:759: warning: too few arguments for format


It also detect where %x is used instead of %p. And so on.

Frank.

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