Merge branch 'save_ext' into jgrpp

# Conflicts:
#	Makefile.src.in
#	findversion.sh
#	projects/determineversion.vbs
#	src/gamelog.cpp
#	src/gamelog_internal.h
#	src/lang/german.txt
#	src/lang/korean.txt
#	src/network/core/config.h
#	src/network/network.cpp
#	src/network/network_udp.cpp
#	src/rev.h
#	src/saveload/afterload.cpp
#	src/saveload/company_sl.cpp
#	src/saveload/depot_sl.cpp
#	src/saveload/gamelog_sl.cpp
#	src/saveload/misc_sl.cpp
#	src/saveload/order_sl.cpp
#	src/saveload/saveload.cpp
#	src/saveload/station_sl.cpp
#	src/saveload/town_sl.cpp
#	src/saveload/vehicle_sl.cpp
#	src/table/settings.ini
#	src/viewport.cpp

src/saveload/plans_sl.cpp

@@ -21,7 +21,7 @@ static const SaveLoad _plan_desc[] = {
 	SLE_VAR(Plan, visible,        SLE_BOOL),
 	SLE_VAR(Plan, visible_by_all, SLE_BOOL),
 	SLE_VAR(Plan, creation_date,  SLE_INT32),
-	SLE_CONDSTDSTR_X(Plan, name, 0, 0, SL_MAX_VERSION, SlXvFeatureTest(XSLFTO_AND, XSLFI_ENH_VIEWPORT_PLANS, 3)),
+	SLE_CONDSTDSTR_X(Plan, name, 0, SL_MIN_VERSION, SL_MAX_VERSION, SlXvFeatureTest(XSLFTO_AND, XSLFI_ENH_VIEWPORT_PLANS, 3)),
 	SLE_END()
 };