make it take size after all

src/utils.c

@@ -55,12 +55,12 @@ inline bool file_exists(const char *path) {
 }
 
 /* path has to have at least 8 free chars at the end for glob */
-int get_hwmon_dir(char *path) {
+int get_hwmon_dir(char *path, const size_t bufsz) {
 	glob_t g;
 	strncat(path, "/hwmon*", 10);
 
 	if (glob(path, 0, NULL, &g) == 0) {
-		strncpy(path, g.gl_pathv[0], 128); // bug prone, careful
+		strncpy(path, g.gl_pathv[0], bufsz); // same size as hwmon length, careful
 		globfree(&g);
 		return 0;
 	}