Rename qemu_plugin_hwaddr_is_io() address argument 'haddr'
similarly to qemu_plugin_hwaddr_device_offset(), and make
it const.

Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
---
Having the variable named similarly to the 'hwaddr' typedef is
slighly confusing. Also if we declare 'hwaddr' typedef poisoned,
GCC complains qemu_plugin_hwaddr_is_io() use a poisoned variable...

Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
---
 include/qemu/qemu-plugin.h | 2 +-
 plugins/api.c              | 4 ++--
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/include/qemu/qemu-plugin.h b/include/qemu/qemu-plugin.h
index 5502e112c8..89ed579f55 100644
--- a/include/qemu/qemu-plugin.h
+++ b/include/qemu/qemu-plugin.h
@@ -331,7 +331,7 @@ struct qemu_plugin_hwaddr *qemu_plugin_get_hwaddr(qemu_plugin_meminfo_t info,
  * to return information about it. For non-IO accesses the device
  * offset will be into the appropriate block of RAM.
  */
-bool qemu_plugin_hwaddr_is_io(struct qemu_plugin_hwaddr *hwaddr);
+bool qemu_plugin_hwaddr_is_io(const struct qemu_plugin_hwaddr *haddr);
 uint64_t qemu_plugin_hwaddr_device_offset(const struct qemu_plugin_hwaddr *haddr);
 
 typedef void
diff --git a/plugins/api.c b/plugins/api.c
index 53c8a73582..bbdc5a4eb4 100644
--- a/plugins/api.c
+++ b/plugins/api.c
@@ -275,10 +275,10 @@ struct qemu_plugin_hwaddr *qemu_plugin_get_hwaddr(qemu_plugin_meminfo_t info,
 }
 #endif
 
-bool qemu_plugin_hwaddr_is_io(struct qemu_plugin_hwaddr *hwaddr)
+bool qemu_plugin_hwaddr_is_io(const struct qemu_plugin_hwaddr *haddr)
 {
 #ifdef CONFIG_SOFTMMU
-    return hwaddr->is_io;
+    return haddr->is_io;
 #else
     return false;
 #endif
-- 
2.21.3