better check for binary in tracewin script

scripts/tracewin

@@ -3,6 +3,7 @@ from __future__ import print_function
 
 import argparse
 import os
+import shutil
 import subprocess
 
 # This script simply runs TraceWin CLI version.
@@ -53,7 +54,14 @@ parser.add_argument('-s', '--seed', dest='seed',
 args = parser.parse_args()
 
 # A list to be filled depending on arguments given...
-cmd = ["TraceWin64_noX11", "'"+args.project+"'", "hide_esc"]
+binary = None
+for c in ["TraceWin64_noX11", "TraceWin_cli"]:
+    if shutil.which(c):
+        binary = c
+        break
+if binary is None:
+    raise ValueError("Could not find the TraceWin binary")
+cmd = [binary, f"'{args.project}'", "hide_esc"]
 
 # Check that project path exist:
 if not os.path.isfile(args.project):