menuselect/menuselect_curses: Resolves sprintf usage error

Acccording to the man page for sprintf, using the same buffer for
output as one used as an input yields undefined behavior.
This patch should work around this problem.

ASTERISK-27903
Reported-by: Alexander Traud
Change-Id: I2213dcb454aff26457e2e4cc9c6821276463ae3a

diff --git a/menuselect/menuselect_curses.c b/menuselect/menuselect_curses.c
index 97f1f171497ba9e8a0a5e4725a958416986a2758..0917eba62b1b46c411758ea4cf88e5b1b3142e05 100644 (file)
--- a/menuselect/menuselect_curses.c
+++ b/menuselect/menuselect_curses.c
@@ -227,7 +227,7 @@ static void display_mem_info(WINDOW *menu, struct member *mem, int start_y, int
                                buf[0] = '\0';
                                new_line = 1;
                        }
-                       sprintf(buf, "%s%*.*s%s", buf, new_line ? 0 : 1, new_line ? 0 : 1, " ", word);
+                       sprintf(buf + strlen(buf), "%*.*s%s", new_line ? 0 : 1, new_line ? 0 : 1, " ", word);
                        new_line = 0;
                }
                if (strlen(buf)) {