Tune ups for standalones (scp-fs2open#7315)

* Tune ups for standalones

Fixes two warnings from building in standalone and also provide, also adds needed function to actually tell if game is in standalone mode.

* better fix for armor flags

Author: wookieejedi

code/scripting/api/libs/base.cpp

@@ -614,6 +614,14 @@ ADE_FUNC(inDebug, l_Base, nullptr, "Determines if FSO is running in Release or D
 	#endif
 }
 
+ADE_FUNC(inStandalone, l_Base, nullptr, "Determines if FSO is running in Standalone mode or not", "boolean", "true if standalone, false otherwise") {
+	if (Is_standalone) {
+		return ADE_RETURN_TRUE;
+	} else {
+		return ADE_RETURN_FALSE;
+	}
+}
+
 ADE_FUNC(isEngineVersionAtLeast,
 		 l_Base,
 		 "number major, number minor, number build, [number revision = 0]",

code/scripting/api/objs/ship.cpp

@@ -35,7 +35,6 @@
 #include "object/objectdock.h"
 #include "parse/parselo.h"
 #include "playerman/player.h"
-#include "scripting/api/objs/message.h"
 #include "ship/ship.h"
 #include "ship/shipfx.h"
 #include "ship/shiphit.h"

code/ship/ship.cpp

@@ -21086,6 +21086,7 @@ void parse_armor_type()
 	stuff_string(name_buf, F_NAME, NAME_LENGTH);
 
 	tat = ArmorType(name_buf);
+	tat.flags = 0;
 
 	//now parse the actual table (damage type/armor type pairs)
 	tat.ParseData();