Rename the jerry_value_has_error_flag function. (#2290)

Rename the function to represent it's real functionality.

JerryScript-DCO-1.0-Signed-off-by: Istvan Miklos imiklos2@inf.u-szeged.hu

docs/03.API-EXAMPLE.md

@@ -57,7 +57,7 @@ main (void)
   /* Setup Global scope code */
   jerry_value_t parsed_code = jerry_parse (NULL, 0, script, script_size, JERRY_PARSE_NO_OPTS);
 
-  if (!jerry_value_has_error_flag (parsed_code))
+  if (!jerry_value_is_error (parsed_code))
   {
     /* Execute the parsed source code in the Global scope */
     jerry_value_t ret_value = jerry_run (parsed_code);
@@ -325,7 +325,7 @@ main (void)
                           false);
 
     /* If command evaluated successfully, print value, returned by eval */
-    if (jerry_value_has_error_flag (ret_val))
+    if (jerry_value_is_error (ret_val))
     {
       /* Evaluated JS code thrown an exception
        *  and didn't handle it with try-catch-finally */
@@ -462,7 +462,7 @@ add_handler (const jerry_value_t func_value, /**< function object */
   jerry_value_t prop_name = jerry_create_string ((const jerry_char_t *) "x");
   jerry_value_t x_val = jerry_get_property (this_val, prop_name);
 
-  if (!jerry_value_has_error_flag (x_val))
+  if (!jerry_value_is_error (x_val))
   {
     /* Convert Jerry API values to double */
     double x = jerry_get_number_value (x_val);