LibVT: enforce a minimum size of 1 column and 1 row

Fixes #829

2 files changed, 7 insertions, 2 deletions

diff --git a/Libraries/LibVT/Terminal.cpp b/Libraries/LibVT/Terminal.cpp
index 61b72447d4..9ba80fd532 100644
--- a/Libraries/LibVT/Terminal.cpp
+++ b/Libraries/LibVT/Terminal.cpp
@@ -867,6 +867,11 @@ void Terminal::unimplemented_xterm_escape()
 
 void Terminal::set_size(u16 columns, u16 rows)
 {
+    if (!columns)
+        columns = 1;
+    if (!rows)
+        rows = 1;
+
     if (columns == m_columns && rows == m_rows)
         return;
 
diff --git a/Libraries/LibVT/Terminal.h b/Libraries/LibVT/Terminal.h
index ab1a843bb0..8f74acfa09 100644
--- a/Libraries/LibVT/Terminal.h
+++ b/Libraries/LibVT/Terminal.h
@@ -150,8 +150,8 @@ private:
     int m_scroll_region_top { 0 };
     int m_scroll_region_bottom { 0 };
 
-    u16 m_columns { 0 };
-    u16 m_rows { 0 };
+    u16 m_columns { 1 };
+    u16 m_rows { 1 };
 
     u16 m_cursor_row { 0 };
     u16 m_cursor_column { 0 };