Fixed UI32_STRING_ALLOC formatting.

diff --git a/lib/silcutil/silcbuffmt.c b/lib/silcutil/silcbuffmt.c
index 562af7d86501524808c3c596e11645fa77b412cc..abcc65f4df6da7352987983713c9a940fc938b06 100644 (file)
--- a/lib/silcutil/silcbuffmt.c
+++ b/lib/silcutil/silcbuffmt.c
@@ -116,10 +116,12 @@ int silc_buffer_sformat_vp(SilcStack stack, SilcBuffer dst, va_list ap)
     case SILC_PARAM_UI32_STRING_ALLOC:
       {
        unsigned char *x = va_arg(ap, unsigned char *);
-       SilcUInt32 tmp_len = strlen(x);
-       FORMAT_HAS_SPACE(stack, dst, tmp_len);
-       silc_buffer_put(dst, x, tmp_len);
-       silc_buffer_pull(dst, tmp_len);
+       SilcUInt32 tmp_len = x ? strlen(x) : 0;
+       if (x && tmp_len) {
+         FORMAT_HAS_SPACE(stack, dst, tmp_len);
+         silc_buffer_put(dst, x, tmp_len);
+         silc_buffer_pull(dst, tmp_len);
+       }
        break;
       }
     case SILC_PARAM_UI8_NSTRING: