Merge branch 'bugfix_submitting_mutexinit' into bfgminer

miner.c

@@ -5734,6 +5734,8 @@ int main(int argc, char *argv[])
 	strcpy(current_block, block->hash);
 
 	INIT_LIST_HEAD(&scan_devices);
+
+	mutex_init(&submitting_lock);
 	INIT_LIST_HEAD(&submit_waiting);
 
 #ifdef HAVE_OPENCL