Allow NULL putc in bmk_printf_init()

diff --git a/lib/libbmk_core/subr_prf.c b/lib/libbmk_core/subr_prf.c
index 6538d875fc45132018dc4a0483f070104f9d97ac..969543c9df4258866254d0a10c37ebe7042f5ce5 100644 (file)
--- a/lib/libbmk_core/subr_prf.c
+++ b/lib/libbmk_core/subr_prf.c
@@ -81,6 +81,8 @@ void
 bmk_printf_init(void (*putc)(int), void (*flush)(void))
 {
 
+       if (putc == NULL)
+               putc = (void *)nullfun;
        v_putc = putc;
        if (flush == NULL)
                flush = nullfun;