Fix MSVC warnings in library and programs
diff --git a/programs/ssl/ssl_client2.c b/programs/ssl/ssl_client2.c
index 98f8528..2933ab3 100644
--- a/programs/ssl/ssl_client2.c
+++ b/programs/ssl/ssl_client2.c
@@ -1330,7 +1330,7 @@
 
     len = mbedtls_snprintf( (char *) buf, sizeof(buf) - 1, GET_REQUEST,
                     opt.request_page );
-    tail_len = strlen( GET_REQUEST_END );
+    tail_len = (int) strlen( GET_REQUEST_END );
 
     /* Add padding to GET request to reach opt.request_size in length */
     if( opt.request_size != DFL_REQUEST_SIZE &&
diff --git a/programs/ssl/ssl_server2.c b/programs/ssl/ssl_server2.c
index fb5c42f..fdce82d 100644
--- a/programs/ssl/ssl_server2.c
+++ b/programs/ssl/ssl_server2.c
@@ -2049,7 +2049,7 @@
                 unsigned char *larger_buf;
 
                 ori_len = ret;
-                extra_len = mbedtls_ssl_get_bytes_avail( &ssl );
+                extra_len = (int) mbedtls_ssl_get_bytes_avail( &ssl );
 
                 larger_buf = mbedtls_calloc( 1, ori_len + extra_len + 1 );
                 if( larger_buf == NULL )