[$2402] Fix simple warnings

sflphone-common/libs/iax2/iax2-parser.c

@@ -56,7 +56,7 @@ static unsigned short get_uint16(unsigned char *p)
 
 static void internaloutput(const char *str)
 {
-	printf(str);
+    printf("%s",str);
 }
 
 static void internalerror(const char *str)

sflphone-common/src/sip/sdp.cpp

@@ -375,7 +375,7 @@ void Sdp::sdp_add_zrtp_attribute (pjmedia_sdp_media* media, std::string hash)
                             "%.*s %.*s",
                             4,
                             ZRTP_VERSION,
-                            hash.size(),
+                            (int)hash.size(),
                             hash.c_str());
 
     attribute->value.slen = len;