Minor formatting and cosmetic changes

Signed-off-by: Andrzej Kurek <andrzej.kurek@arm.com>
diff --git a/library/ssl_tls.c b/library/ssl_tls.c
index 597273b..e4db522 100644
--- a/library/ssl_tls.c
+++ b/library/ssl_tls.c
@@ -4903,7 +4903,7 @@
         if( ( mask[len / 8] & ( 1 << ( 7 - i ) ) ) == 0 )
             return( BITMASK_CHECK_FAILED );
 
-        return( 0 );
+    return( 0 );
 }
 
 /* msg_len does not include the handshake header */
@@ -7168,7 +7168,7 @@
 
     digest_len = mbedtls_md_get_size( digest_info );
     if( digest_len > MBEDTLS_SSL_PEER_CERT_DIGEST_MAX_LEN )
-        return( 0x75555555 );
+        return( PEER_CRT_CHANGED );
 
     ret = mbedtls_md( digest_info, crt_buf, crt_buf_len, tmp_digest );
     if( ret != 0 )