[PATCH v2 4/5] wmc: Replace sprintf with snprintf to avoid deprecation warnings on macOS.

[Brendan Shanks]

From: Brendan Shanks

---
 tools/wmc/write.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/tools/wmc/write.c b/tools/wmc/write.c
index 353a503f674..29251d44dd1 100644
--- a/tools/wmc/write.c
+++ b/tools/wmc/write.c
@@ -308,6 +308,7 @@ static void write_rcbin(FILE *fp)
 static char *make_string(WCHAR *uc, int len)
 {
     char *str = xmalloc(7*len + 12);
+    char *str_end = str + (7*len + 12);
     char *cptr = str;
     int i;
     int b;
@@ -336,7 +337,7 @@ static char *make_string(WCHAR *uc, int len)
             }
             else
             {
-                int n = sprintf(cptr, "\x%04x", *uc);
+                int n = snprintf(cptr, str_end - cptr, "\x%04x", *uc);
                 cptr += n;
                 b += n;
             }