Merge pull request #1348 in FS/freeswitch from…

Merge pull request #1348 in FS/freeswitch from ~ANDYWOLK/freeswitch:bugfix/FS-10064-cannot-compile-mod_managed-under to master

* commit '5626d0b5':
  FS-10064: [mod_managed] Fix compile on windows.

src/include/switch_utils.h

@@ -57,7 +57,9 @@ static inline char *switch_get_hex_bytes(switch_byte_t *buf, switch_size_t datal
 	pp = new_buf;
 
 	for (p = buf; p < e && pp < ee - 4; p++) {
-		snprintf(pp, 4, "%.2x ", (int)*p);
+		if (snprintf(pp, 4, "%.2x ", (int)*p) < 0) {
+			return NULL;
+		}
 		pp += 3;
 	}
 	*(pp-1) = '\0';