fix for FSCORE-78. Write whole buffer of the pid into file with padded NULL's…

fix for FSCORE-78.  Write whole buffer of the pid into file with padded NULL's so that we don't leave leftovers behind from a crash.

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@6977 d0543943-73ff-0310-b7d9-9358b9ac24b2

src/switch.c

@@ -443,9 +443,10 @@ int main(int argc, char *argv[])
 
 	pid = getpid();
 
+	memset(pid_buffer, 0, sizeof(pid_buffer));
 	switch_snprintf(pid_path, sizeof(pid_path), "%s%s%s", SWITCH_GLOBAL_dirs.log_dir, SWITCH_PATH_SEPARATOR, pfile);
 	switch_snprintf(pid_buffer, sizeof(pid_buffer), "%d", pid);
-	pid_len = strlen(pid_buffer);
+	pid_len = sizeof(pid_buffer);
 
 	apr_pool_create(&pool, NULL);
     if (switch_file_open(&fd,