Fix build error with gcc -Werror=misleading-indentation

Fix misleading indentation. This was just bad indentation, the
behavior was correct. It was detected by gcc 6.
diff --git a/library/x509_crl.c b/library/x509_crl.c
index a3ef8b4..91bbf05 100644
--- a/library/x509_crl.c
+++ b/library/x509_crl.c
@@ -502,14 +502,14 @@
     {
         mbedtls_pem_init( &pem );
 
-    /* Avoid calling mbedtls_pem_read_buffer() on non-null-terminated string */
-    if( buflen == 0 || buf[buflen - 1] != '\0' )
-        ret = MBEDTLS_ERR_PEM_NO_HEADER_FOOTER_PRESENT;
-    else
-        ret = mbedtls_pem_read_buffer( &pem,
-                               "-----BEGIN X509 CRL-----",
-                               "-----END X509 CRL-----",
-                               buf, NULL, 0, &use_len );
+        /* Avoid calling mbedtls_pem_read_buffer() on non-null-terminated string */
+        if( buflen == 0 || buf[buflen - 1] != '\0' )
+            ret = MBEDTLS_ERR_PEM_NO_HEADER_FOOTER_PRESENT;
+        else
+            ret = mbedtls_pem_read_buffer( &pem,
+                                           "-----BEGIN X509 CRL-----",
+                                           "-----END X509 CRL-----",
+                                           buf, NULL, 0, &use_len );
 
         if( ret == 0 )
         {
@@ -522,7 +522,7 @@
             buf += use_len;
 
             if( ( ret = mbedtls_x509_crl_parse_der( chain,
-                                            pem.buf, pem.buflen ) ) != 0 )
+                                                    pem.buf, pem.buflen ) ) != 0 )
             {
                 mbedtls_pem_free( &pem );
                 return( ret );