patch 9.0.1126: bracketed paste can be enabled when it is not recognized

Problem:    Bracketed paste can be enabled when pasted text is not recognized.
Solution:   Output t_BE only when t_PS and t_PE are set.
diff --git a/src/normal.c b/src/normal.c
index 4df6b6a..cc4e246 100644
--- a/src/normal.c
+++ b/src/normal.c
@@ -454,7 +454,7 @@
 	    MAY_WANT_TO_LOG_THIS;
 
 	    // Re-enable bracketed paste mode and modifyOtherKeys
-	    out_str(T_BE);
+	    out_str_t_BE();
 	    out_str_t_TI();
 	}