patch 8.2.3764: cannot see any text when window was made zero lines

Problem:    Cannot see any text when window was made zero lines or zero
            columns.
Solution:   Ensure there is at least one line and column. (fixes #9307)
diff --git a/src/edit.c b/src/edit.c
index 686c6d4..8dd6094 100644
--- a/src/edit.c
+++ b/src/edit.c
@@ -618,6 +618,11 @@
 	    c = hkmap(c);		// Hebrew mode mapping
 #endif
 
+	// If the window was made so small that nothing shows, make it at least
+	// one line and one column when typing.
+	if (KeyTyped && !KeyStuffed)
+	    win_ensure_size();
+
 	/*
 	 * Special handling of keys while the popup menu is visible or wanted
 	 * and the cursor is still in the completed word.  Only when there is