minikconf: accept alnum identifiers

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

scripts/minikconf.py

@@ -645,7 +645,7 @@ def scan_token(self):
             self.cursor = self.src.find('\n', self.cursor)
             self.val = self.src[start:self.cursor]
             return TOK_SOURCE
-        elif self.tok.isalpha():
+        elif self.tok.isalnum():
             # identifier
             while self.src[self.cursor].isalnum() or self.src[self.cursor] == '_':
                 self.cursor += 1