Codechange: name a few unnamed settings as to not to have to check for that being empty

src/table/settings/game_settings.ini

@@ -360,14 +360,14 @@ cat      = SC_EXPERT
 ## Old vehicle settings.
 
 [SDTG_BOOL]
-name     = """"
+name     = ""vehicle.servint_ispercent""
 flags    = SF_NO_NETWORK
 var      = _old_vds.servint_ispercent
 def      = false
 to       = SLV_120
 
 [SDTG_VAR]
-name     = """"
+name     = ""vehicle.servint_trains""
 type     = SLE_UINT16
 flags    = SF_GUI_0_IS_SPECIAL
 var      = _old_vds.servint_trains
@@ -377,7 +377,7 @@ max      = 800
 to       = SLV_120
 
 [SDTG_VAR]
-name     = """"
+name     = ""vehicle.servint_roadveh""
 type     = SLE_UINT16
 flags    = SF_GUI_0_IS_SPECIAL
 var      = _old_vds.servint_roadveh
@@ -387,7 +387,7 @@ max      = 800
 to       = SLV_120
 
 [SDTG_VAR]
-name     = """"
+name     = ""vehicle.servint_ships""
 type     = SLE_UINT16
 flags    = SF_GUI_0_IS_SPECIAL
 var      = _old_vds.servint_ships
@@ -397,7 +397,7 @@ max      = 800
 to       = SLV_120
 
 [SDTG_VAR]
-name     = """"
+name     = ""vehicle.servint_aircraft""
 type     = SLE_UINT16
 flags    = SF_GUI_0_IS_SPECIAL
 var      = _old_vds.servint_aircraft