Fix compilation error of set_thread_log_function.

git-svn-id: http://subversion.jackaudio.org/jack/jack2/trunk/jackmp@4019 0c269be4-1314-0410-8aa9-9f06e86f4224

common/JackError.cpp

@@ -33,7 +33,7 @@ static bool change_thread_log_function(jack_log_function_t log_function)
             && jack_tls_set(JackGlobals::fKeyLogFunction, (void*)log_function));
 }
 
-SERVER_EXPORT bool set_threaded_log_function()
+SERVER_EXPORT int set_threaded_log_function()
 {
     return change_thread_log_function(JackMessageBufferAdd);
 }

common/JackError.h

@@ -55,7 +55,7 @@ extern "C"
 
     void jack_log_function(int level, const char *message);
    
-    SERVER_EXPORT bool set_threaded_log_function();
+    SERVER_EXPORT int set_threaded_log_function();
 
 #ifdef __cplusplus
 }