AP_Scripting: suppress cast-align warnings in Lua interpreter

this is externally maintained code that makes heavy use of casting

libraries/AP_Scripting/lua/src/ldebug.c

@@ -29,7 +29,8 @@
 #include "ltm.h"
 #include "lvm.h"
 
-
+// lua code does lots of casting, these warnings are not helpful
+#pragma GCC diagnostic ignored "-Wcast-align"
 
 #define noLuaClosure(f)		((f) == NULL || (f)->c.tt == LUA_TCCL)
 

libraries/AP_Scripting/lua/src/ldo.c

@@ -33,7 +33,8 @@
 #include "lvm.h"
 #include "lzio.h"
 
-
+// lua code does lots of casting, these warnings are not helpful
+#pragma GCC diagnostic ignored "-Wcast-align"
 
 #define errorstatus(s)	((s) > LUA_YIELD)
 

libraries/AP_Scripting/lua/src/llex.c

@@ -27,6 +27,8 @@
 #include "ltable.h"
 #include "lzio.h"
 
+// lua code does lots of casting, these warnings are not helpful
+#pragma GCC diagnostic ignored "-Wcast-align"
 
 
 #define next(ls) (ls->current = zgetc(ls->z))

libraries/AP_Scripting/lua/src/lstate.c

@@ -27,6 +27,9 @@
 #include "ltable.h"
 #include "ltm.h"
 
+// lua code does lots of casting, these warnings are not helpful
+#pragma GCC diagnostic ignored "-Wcast-align"
+
 
 #if !defined(LUAI_GCPAUSE)
 #define LUAI_GCPAUSE	200  /* 200% */

libraries/AP_Scripting/lua/src/ltm.c

@@ -23,6 +23,8 @@
 #include "ltm.h"
 #include "lvm.h"
 
+// lua code does lots of casting, these warnings are not helpful
+#pragma GCC diagnostic ignored "-Wcast-align"
 
 static const char udatatypename[] = "userdata";