Fix inconsistent sign in log__printf declaration.

lib/logging_mosq.c

@@ -23,11 +23,12 @@ Contributors:
 #include <stdio.h>
 #include <string.h>
 
+#include "logging_mosq.h"
 #include "mosquitto_internal.h"
 #include "mosquitto.h"
 #include "memory_mosq.h"
 
-int log__printf(struct mosquitto *mosq, int priority, const char *fmt, ...)
+int log__printf(struct mosquitto *mosq, unsigned int priority, const char *fmt, ...)
 {
 	va_list va;
 	char *s;
@@ -50,7 +51,7 @@ int log__printf(struct mosquitto *mosq, int priority, const char *fmt, ...)
 		va_end(va);
 		s[len-1] = '\0'; /* Ensure string is null terminated. */
 
-		mosq->on_log(mosq, mosq->userdata, priority, s);
+		mosq->on_log(mosq, mosq->userdata, (int)priority, s);
 
 		mosquitto__free(s);
 	}

lib/logging_mosq.h

@@ -20,6 +20,10 @@ Contributors:
 
 #include "mosquitto.h"
 
-int log__printf(struct mosquitto *mosq, unsigned int priority, const char *fmt, ...);
+#ifndef __GNUC__
+#define __attribute__(attrib)
+#endif
+
+int log__printf(struct mosquitto *mosq, unsigned int level, const char *fmt, ...) __attribute__((format(printf, 3, 4)));
 
 #endif

src/logging.c

@@ -34,6 +34,7 @@ Contributors:
 #include <dlt/dlt.h>
 #endif
 
+#include "logging_mosq.h"
 #include "mosquitto_broker_internal.h"
 #include "memory_mosq.h"
 #include "misc_mosq.h"

src/mosquitto_broker_internal.h

@@ -34,6 +34,7 @@ Contributors:
 #include "mosquitto_broker.h"
 #include "mosquitto_plugin.h"
 #include "mosquitto.h"
+#include "logging_mosq.h"
 #include "password_mosq.h"
 #include "tls_mosq.h"
 #include "uthash.h"
@@ -709,7 +710,6 @@ int control__unregister_callback(struct mosquitto__security_options *opts, MOSQ_
  * ============================================================ */
 int log__init(struct mosquitto__config *config);
 int log__close(struct mosquitto__config *config);
-int log__printf(struct mosquitto *mosq, unsigned int level, const char *fmt, ...) __attribute__((format(printf, 3, 4)));
 void log__internal(const char *fmt, ...) __attribute__((format(printf, 1, 2)));
 
 /* ============================================================