Add explicit defaults for MAPSEC data

src/data/region_map/region_map_sections.json.txt

@@ -22,18 +22,28 @@ const struct RegionMapLocation gRegionMapEntries[] = {
     [{{ map_section.id }}] = {
 {% if existsIn(map_section, "x") %}
         .x = {{ map_section.x }},
+{% else %}
+        .x = 0,
 {% endif %}
 {% if existsIn(map_section, "y") %}
         .y = {{ map_section.y }},
+{% else %}
+        .y = 0,
 {% endif %}
 {% if existsIn(map_section, "width") %}
         .width = {{ map_section.width }},
+{% else %}
+        .width = 1,
 {% endif %}
 {% if existsIn(map_section, "height") %}
         .height = {{ map_section.height }},
+{% else %}
+        .height = 1,
 {% endif %}
 {% if existsIn(map_section, "name") %}
         .name = sMapName_{{ cleanString(map_section.name) }}{% if existsIn(map_section, "name_clone") %}_Clone{% endif %},
+{% else %}
+        .name = (const u8[])_(""),
 {% endif %}
     },
 ## endfor