[PATCH] Pointer dereference before NULL check in ACPI thermal driver

Again, found with coverity's checker.
Signed-off-by: Dave Jones <davej@redhat.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

drivers/acpi/thermal.c

@@ -659,7 +659,7 @@ acpi_thermal_check (
 	struct acpi_thermal	*tz = (struct acpi_thermal *) data;
 	unsigned long		sleep_time = 0;
 	int			i = 0;
-	struct acpi_thermal_state state = tz->state;
+	struct acpi_thermal_state state;
 
 	ACPI_FUNCTION_TRACE("acpi_thermal_check");
 
@@ -668,6 +668,8 @@ acpi_thermal_check (
 		return_VOID;
 	}
 
+	state = tz->state;
+
 	result = acpi_thermal_get_temperature(tz);
 	if (result)
 		return_VOID;