Insert come casts to allow C++ compilation

src/algo.h

@@ -107,7 +107,7 @@ static void check_subject (lua_State *L, int pos, TArgExec *argE)
     if (type != LUA_TLIGHTUSERDATA)
       luaL_error (L, "subject's topointer method returned %s (expected lightuserdata)",
                   lua_typename (L, type));
-    argE->text = lua_touserdata (L, -1);
+    argE->text = (const char*) lua_touserdata (L, -1);
     lua_pop (L, 1);
 #if LUA_VERSION_NUM == 501
     if (luaL_callmeta (L, pos, "__len")) {

src/common.c

@@ -126,7 +126,7 @@ void freelist_free (TFreeList *fl) {
 enum { ID_NUMBER, ID_STRING };
 
 void buffer_init (TBuffer *buf, size_t sz, lua_State *L, TFreeList *fl) {
-  buf->arr = Lmalloc(L, sz);
+  buf->arr = (char*) Lmalloc(L, sz);
   if (!buf->arr) {
     freelist_free (fl);
     luaL_error (L, "malloc failed");

src/oniguruma/lonig.c

@@ -102,7 +102,7 @@ static int getcflags (lua_State *L, int pos) {
 
 static int generate_error (lua_State *L, const TOnig *ud, int errcode) {
   char buf [ONIG_MAX_ERROR_MESSAGE_LEN];
-  onig_error_code_to_str(buf, errcode, &ud->einfo);
+  onig_error_code_to_str((unsigned char*) buf, errcode, &ud->einfo);
   return luaL_error(L, buf);
 }
 
@@ -206,7 +206,7 @@ static void checkarg_compile (lua_State *L, int pos, TArgComp *argC) {
 */
 static int LOnig_setdefaultsyntax (lua_State *L) {
   (void)luaL_checkstring(L, 1);
-  onig_set_default_syntax(getsyntax(L, 1));
+  onig_set_default_syntax((OnigSyntaxType*) getsyntax(L, 1));
   return 0;
 }
 

src/pcre/lpcre.c

@@ -177,7 +177,7 @@ static void checkarg_compile (lua_State *L, int pos, TArgComp *argC) {
       argC->locale = lua_tostring (L, pos);
     else {
       argC->tablespos = pos;
-      argC->tables = *check_chartables (L, pos);
+      argC->tables = (const unsigned char*) *check_chartables (L, pos);
     }
   }
 }