tree data UPDATE always log errors

Author: michalvasko

src/tree_data.h

@@ -2722,7 +2722,7 @@ LIBYANG_API_DECL LY_ERR lyd_leafref_link_node_tree(const struct lyd_node *tree);
 /**
  * @brief Check a string matches an XML Schema regex used in YANG.
  *
- * @param[in] ctx Optional context for logging.
+ * @param[in] ctx Optional context for storing errors.
  * @param[in] pattern Regular expression pattern to use.
  * @param[in] string String to match.
  * @param[in] str_len Length of @p string, may be 0 if string is 0-terminated.

src/tree_data_common.c

@@ -1898,9 +1898,7 @@ ly_pattern_match(const struct ly_ctx *ctx, const char *pattern, const char *stri
     }
     r = ly_pattern_code_match(code, string, str_len, &err);
     if (r && (r != LY_ENOT)) {
-        if (ctx) {
-            ly_err_print(ctx, err);
-        }
+        ly_err_print(ctx, err);
         ly_err_free(err);
         return r;
     }