urngd: Fix wrong type in format string
authorHauke Mehrtens <hauke@hauke-m.de>
Sun, 16 Jun 2019 14:38:56 +0000 (16:38 +0200)
committerHauke Mehrtens <hauke@hauke-m.de>
Sun, 16 Jun 2019 14:40:08 +0000 (16:40 +0200)
GCC 9.1 complains about this wrong type used in the format string, fix
this to make the compiler happy.

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>

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