src: fix null receiver error on useless-signature warning

Signed-off-by: Alexis Laferrière <alexis.laf@xymus.net>

diff --git a/src/modelize/modelize_property.nit b/src/modelize/modelize_property.nit
index eec36f4..9cdf578 100644 (file)
--- a/src/modelize/modelize_property.nit
+++ b/src/modelize/modelize_property.nit
@@ -1536,7 +1536,7 @@ redef class AAttrPropdef
                        ntype = n_intro.n_type.mtype
                end
                # check
-               if ntype ==null or ntype != n_type.mtype then return
+               if ntype == null or ntype != n_type.mtype or mpropdef == null then return
                modelbuilder.advice(n_type, "useless-signature", "Warning: useless type repetition on redefined attribute `{mpropdef.name}`")
        end
 end