[json-glib/wip/issue-58] Do not leak memory for duplicate var assignment

[Richard Hughes <rhughes src gnome org>]

commit f321637f96108d1a1106fd52dfee1961c6b68aa9
Author: Richard Hughes <richard hughsie com>
Date:   Sat Feb 20 11:21:36 2021 +0000

    Do not leak memory for duplicate var assignment
    
    Fixes https://gitlab.gnome.org/GNOME/json-glib/-/issues/58

 json-glib/json-parser.c | 2 ++
 1 file changed, 2 insertions(+)
---
diff --git a/json-glib/json-parser.c b/json-glib/json-parser.c
index 4a560d8..94a2358 100644
--- a/json-glib/json-parser.c
+++ b/json-glib/json-parser.c
@@ -844,6 +844,8 @@ json_parse_statement (JsonParser  *parser,
             return '=';
           }
 
+        if (priv->has_assignment)
+          g_free (priv->variable_name);
         priv->has_assignment = TRUE;
         priv->variable_name = name;