Drop -Werror= (uninitialized cause issues from gcc-12) and also backport
fix for the offending variable.

Note: upstream changed how -Werror is handled next release, currently pass
a hard non-specific -Werror and disables it for gcc-12 (review on bump, see
commit/PR below).

https://bugs.gentoo.org/859277
https://github.com/widelands/widelands/pull/5415
https://github.com/widelands/widelands/commit/e4da6d624
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -312,8 +312,2 @@
 if(NOT MSVC)
-  # Turn some warnings into errors.
-  wl_add_flag(WL_COMPILE_DIAGNOSTICS "-Werror=format-security")
-  wl_add_flag(WL_COMPILE_DIAGNOSTICS "-Werror=return-type")
-  wl_add_flag(WL_COMPILE_DIAGNOSTICS "-Werror=shadow")
-  wl_add_flag(WL_COMPILE_DIAGNOSTICS "-Werror=uninitialized")
-
   wl_add_flag(WL_GENERIC_CXX_FLAGS "-std=c++11")
--- a/src/editor/editorinteractive.h
+++ b/src/editor/editorinteractive.h
@@ -87,4 +87,4 @@
 		EditorIncreaseResourcesTool increase_resources;
-		EditorSetPortSpaceTool set_port_space;
 		EditorUnsetPortSpaceTool unset_port_space;
+		EditorSetPortSpaceTool set_port_space;
 		EditorSetOriginTool set_origin;