Tools: Fix recurring multiple times over the same library in deploy-mac.py

Tools/deploy-mac.py

@@ -96,6 +96,7 @@ def updateMachO(bin, execPath, root):
 		if os.access(newPath, os.F_OK):
 			if verbose:
 				print('Skipping copying {}, already done.'.format(oldPath))
+			newPath = None
 		elif os.path.abspath(oldPath) != os.path.abspath(newPath):
 			if verbose:
 				print('Copying {} to {}...'.format(oldPath, newPath))
@@ -111,6 +112,7 @@ def updateMachO(bin, execPath, root):
 	args = [installNameTool]
 	for path, oldExecPath, newExecPath in toUpdate:
 		if path != bin:
+			if path:
 				updateMachO(path, execPath, root)
 			if verbose:
 				print('Updating Mach-O load from {} to {}...'.format(oldExecPath, newExecPath))