locale-util: introduce common helper locale_variables_free() for freeing locale variable arrays

src/basic/locale-util.c

@@ -389,6 +389,16 @@ const char *special_glyph(SpecialGlyph code) {
         return draw_table[is_locale_utf8()][code];
 }
 
+void locale_variables_free(char*l[_VARIABLE_LC_MAX]) {
+        LocaleVariable i;
+
+        if (!l)
+                return;
+
+        for (i = 0; i < _VARIABLE_LC_MAX; i++)
+                l[i] = mfree(l[i]);
+}
+
 static const char * const locale_variable_table[_VARIABLE_LC_MAX] = {
         [VARIABLE_LANG] = "LANG",
         [VARIABLE_LANGUAGE] = "LANGUAGE",

src/basic/locale-util.h

@@ -66,3 +66,8 @@ static inline void freelocalep(locale_t *p) {
 
         freelocale(*p);
 }
+
+void locale_variables_free(char* l[_VARIABLE_LC_MAX]);
+static inline void locale_variables_freep(char*(*l)[_VARIABLE_LC_MAX]) {
+        locale_variables_free(*l);
+}