🔨 Fix marlin_custom.* without lib_deps

Author: thinkyhead

buildroot/share/PlatformIO/scripts/common-dependencies.py

@@ -67,6 +67,7 @@ def add_to_feat_cnf(feature, flines):
                 for dep in re.split(r',\s*', line):
                     lib_name = re.sub(r'@([~^]|[<>]=?)?[\d.]+', '', dep.strip()).split('=').pop(0)
                     lib_re = re.compile('(?!^' + lib_name + '\\b)')
+                    if not 'lib_deps' in feat: feat['lib_deps'] = {}
                     feat['lib_deps'] = list(filter(lib_re.match, feat['lib_deps'])) + [dep]
                     blab("[%s] lib_deps = %s" % (feature, dep), 3)