Meson update and gdb fix.

.gdbinit

@@ -7,4 +7,4 @@ set pagination off
 break abort
 #break _invalid_parameter_noinfo
 #break _invalid_parameter
-catch throw
+# catch throw

meson.build

@@ -60,6 +60,7 @@ runtests = executable('runtests',
   'tests/gui.cpp',
   'tests/worldbuilder.cpp',
   'tests/inventory.cpp',
+  'tests/matrix2.cpp',
   ], cpp_args:['-Wextra','-Werror'],
   dependencies: dependencies + catch2)