locking: Add const char * parameter to avoid ugly typecasts

src/locking/lock_driver.h

@@ -66,6 +66,7 @@ typedef enum {
 
 enum {
     VIR_LOCK_MANAGER_PARAM_TYPE_STRING,
+    VIR_LOCK_MANAGER_PARAM_TYPE_CSTRING,
     VIR_LOCK_MANAGER_PARAM_TYPE_INT,
     VIR_LOCK_MANAGER_PARAM_TYPE_LONG,
     VIR_LOCK_MANAGER_PARAM_TYPE_UINT,
@@ -84,6 +85,7 @@ struct _virLockManagerParam {
         unsigned long long ul;
         double d;
         char *str;
+        const char *cstr;
         unsigned char uuid[16];
     } value;
 };

src/locking/lock_manager.c

@@ -99,6 +99,9 @@ static void virLockManagerLogParams(size_t nparams,
         case VIR_LOCK_MANAGER_PARAM_TYPE_STRING:
             VIR_DEBUG("  key=%s type=string value=%s", params[i].key, params[i].value.str);
             break;
+        case VIR_LOCK_MANAGER_PARAM_TYPE_CSTRING:
+            VIR_DEBUG("  key=%s type=cstring value=%s", params[i].key, params[i].value.cstr);
+            break;
         case VIR_LOCK_MANAGER_PARAM_TYPE_UUID:
             virUUIDFormat(params[i].value.uuid, uuidstr);
             VIR_DEBUG("  key=%s type=uuid value=%s", params[i].key, uuidstr);