fix migrations

services/migrations/0026_auto_20170607_2306.py

@@ -26,7 +26,7 @@ class Migration(migrations.Migration):
             name='Antenna',
             fields=[
                 ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
-                ('position', django.contrib.gis.db.models.fields.PointField(null=True, srid=4326)),
+                ('position', django.contrib.gis.db.models.fields.PointField(blank=True, null=True, srid=4326)),
                 ('mac', models.CharField(blank=True, default='', max_length=17, validators=[django.core.validators.RegexValidator('^([0-9a-fA-F]{2}([:-]?|$)){6}$')])),
                 ('notes', models.TextField(blank=True)),
             ],

services/migrations/0027_auto_20170607_2356.py

@@ -24,9 +24,4 @@ class Migration(migrations.Migration):
             name='mac',
             field=models.CharField(blank=True, default='', max_length=17, validators=[django.core.validators.RegexValidator('^([0-9a-fA-F]{2}([:-]?|$)){6}$')], verbose_name='Adresse MAC'),
         ),
-        migrations.AlterField(
-            model_name='antenna',
-            name='position',
-            field=django.contrib.gis.db.models.fields.PointField(blank=True, null=True, srid=4326),
-        ),
     ]