os: support %c in pnprintf

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Reviewed-by: Keith Packard <keithp@keithp.com>
(cherry picked from commit d903d17d7f006fa333265b8476063b189c20d082)

1 files changed, 7 insertions, 0 deletions

diff --git a/os/log.c b/os/log.c
index e4e9e8b9d..9f95743b5 100644
--- a/os/log.c
+++ b/os/log.c
@@ -450,6 +450,13 @@ pnprintf(char *string, size_t size, const char *f, va_list args)
                     string[s_idx++] = number[i];
             }
             break;
+        case 'c':
+            {
+                char c = va_arg(args, int);
+                if (s_idx < size - 1)
+                    string[s_idx++] = c;
+            }
+            break;
         case '%':
             string[s_idx++] = '%';
             break;