sysemu/runstate: Let runstate_is_running() return bool

runstate_check() returns a boolean. runstate_is_running()
returns what runstate_check() returns, also a boolean.

Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20210111152020.1422021-2-philmd@redhat.com>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>

include/sysemu/runstate.h

@@ -6,7 +6,7 @@
 
 bool runstate_check(RunState state);
 void runstate_set(RunState new_state);
-int runstate_is_running(void);
+bool runstate_is_running(void);
 bool runstate_needs_reset(void);
 bool runstate_store(char *str, size_t size);
 

softmmu/runstate.c

@@ -218,7 +218,7 @@ void runstate_set(RunState new_state)
     current_run_state = new_state;
 }
 
-int runstate_is_running(void)
+bool runstate_is_running(void)
 {
     return runstate_check(RUN_STATE_RUNNING);
 }