scripts: kconfig: fix dt_nodelabel_int_prop crash if prop doesn't exist

[mathieuchopstm]

dt_nodelabel_int_prop did not check if the property existed on the node before accessing it, which would result in a build-time crash (KeyError exception) and thus build error if used on a node which lacked the requested property.

Fix by using the common _node_int_prop() helper which handles all edge cases properly.

NOTE: there is a tiny functional difference compared to my original idea which was

-    if not node or node.props[prop].type != "int":
+    if not node:
       return "0"

+    if not prop in node.props:     # <=== this is the missing check
+      return "0"
+
+    if node.props[prop].type != "int":
+      return "0"

   if not node.props[prop].val:
       return "0"

   return str(node.props[prop].val)

➡️ _node_int_prop() does not check for node.props[prop].val is not None

However, the check for type should be sufficient since according to edtlib documentation:

zephyr/scripts/dts/python-devicetree/src/devicetree/edtlib.py

Lines 682 to 687 in 8d202cb

	val:
	The value of the property, with the format determined by spec.type,
	which comes from the 'type:' string in the binding.
	- For 'type: int/array/string/string-array', 'val' is what you'd expect
	(a Python integer or string, or a list of them)

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

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