util: json: Make function to free JSON values in virHash universal

Move the helper that frees JSON entries put into hash tables into the
JSON module so that it does not have to be reimplemented.

src/libvirt_private.syms

@@ -1835,6 +1835,7 @@ virJSONValueGetNumberLong;
 virJSONValueGetNumberUint;
 virJSONValueGetNumberUlong;
 virJSONValueGetString;
+virJSONValueHashFree;
 virJSONValueIsArray;
 virJSONValueIsNull;
 virJSONValueNewArray;

src/qemu/qemu_monitor_json.c

@@ -7488,14 +7488,6 @@ qemuMonitorJSONFillQMPSchema(size_t pos ATTRIBUTE_UNUSED,
 }
 
 
-static void
-qemuMonitorJSONFreeSchemaEntry(void *opaque,
-                               const void *name ATTRIBUTE_UNUSED)
-{
-    virJSONValueFree(opaque);
-}
-
-
 virHashTablePtr
 qemuMonitorJSONQueryQMPSchema(qemuMonitorPtr mon)
 {
@@ -7516,7 +7508,7 @@ qemuMonitorJSONQueryQMPSchema(qemuMonitorPtr mon)
 
     arr = virJSONValueObjectGet(reply, "return");
 
-    if (!(schema = virHashCreate(512, qemuMonitorJSONFreeSchemaEntry)))
+    if (!(schema = virHashCreate(512, virJSONValueHashFree)))
         goto cleanup;
 
     if (virJSONValueArrayForeachSteal(arr, qemuMonitorJSONFillQMPSchema,

src/util/virjson.c

@@ -376,6 +376,14 @@ virJSONValueFree(virJSONValuePtr value)
 }
 
 
+void
+virJSONValueHashFree(void *opaque,
+                     const void *name ATTRIBUTE_UNUSED)
+{
+    virJSONValueFree(opaque);
+}
+
+
 virJSONValuePtr
 virJSONValueNewString(const char *data)
 {

src/util/virjson.h

@@ -81,6 +81,7 @@ struct _virJSONValue {
 };
 
 void virJSONValueFree(virJSONValuePtr value);
+void virJSONValueHashFree(void *opaque, const void *name);
 
 int virJSONValueObjectCreate(virJSONValuePtr *obj, ...)
     ATTRIBUTE_NONNULL(1) ATTRIBUTE_SENTINEL;