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-rw-r--r--src/town_gui.cpp4
1 files changed, 2 insertions, 2 deletions
diff --git a/src/town_gui.cpp b/src/town_gui.cpp
index 4803e3bf2..c76556170 100644
--- a/src/town_gui.cpp
+++ b/src/town_gui.cpp
@@ -554,7 +554,7 @@ public:
while (i < this->towns.Length()) {
const Town *t = this->towns[i];
- assert(t->xy);
+ assert(t->xy != INVALID_TILE);
SetDParam(0, t->index);
SetDParam(1, t->population);
@@ -601,7 +601,7 @@ public:
if (id_v >= this->towns.Length()) return; // click out of town bounds
const Town *t = this->towns[id_v];
- assert(t->xy);
+ assert(t->xy != INVALID_TILE);
if (_ctrl_pressed) {
ShowExtraViewPortWindow(t->xy);
} else {