modify programs/*.c to use polarssl_snprintf
diff --git a/programs/pkey/pk_verify.c b/programs/pkey/pk_verify.c
index d8cd9a1..923afc1 100644
--- a/programs/pkey/pk_verify.c
+++ b/programs/pkey/pk_verify.c
@@ -32,6 +32,7 @@
 #include <stdio.h>
 #define polarssl_snprintf   snprintf
 #define polarssl_printf     printf
+#define polarssl_snprintf   snprintf
 #endif
 
 #if defined(POLARSSL_BIGNUM_C) && \