migration: Add Error** argument to ram_state_init()

Since the return value not exploited, follow the recommendations of
qapi/error.h and change it to a bool

Signed-off-by: Cédric Le Goater <clg@redhat.com>
Reviewed-by: Fabiano Rosas <farosas@suse.de>
Link: https://lore.kernel.org/r/20240320064911.545001-13-clg@redhat.com
Signed-off-by: Peter Xu <peterx@redhat.com>

migration/ram.c

@@ -2780,13 +2780,13 @@ static int xbzrle_init(void)
     return -ENOMEM;
 }
 
-static int ram_state_init(RAMState **rsp)
+static bool ram_state_init(RAMState **rsp, Error **errp)
 {
     *rsp = g_try_new0(RAMState, 1);
 
     if (!*rsp) {
-        error_report("%s: Init ramstate fail", __func__);
-        return -1;
+        error_setg(errp, "%s: Init ramstate fail", __func__);
+        return false;
     }
 
     qemu_mutex_init(&(*rsp)->bitmap_mutex);
@@ -2802,7 +2802,7 @@ static int ram_state_init(RAMState **rsp)
     (*rsp)->migration_dirty_pages = (*rsp)->ram_bytes_total >> TARGET_PAGE_BITS;
     ram_state_reset(*rsp);
 
-    return 0;
+    return true;
 }
 
 static void ram_list_init_bitmaps(void)
@@ -2897,7 +2897,10 @@ static void ram_init_bitmaps(RAMState *rs)
 
 static int ram_init_all(RAMState **rsp)
 {
-    if (ram_state_init(rsp)) {
+    Error *local_err = NULL;
+
+    if (!ram_state_init(rsp, &local_err)) {
+        error_report_err(local_err);
         return -1;
     }
 
@@ -3624,7 +3627,11 @@ void ram_handle_zero(void *host, uint64_t size)
 
 static void colo_init_ram_state(void)
 {
-    ram_state_init(&ram_state);
+    Error *local_err = NULL;
+
+    if (!ram_state_init(&ram_state, &local_err)) {
+        error_report_err(local_err);
+    }
 }
 
 /*