pass cache_document_size to document open

This is how mupdf API is structured

pdf.c

@@ -166,7 +166,7 @@ static int openDocument(lua_State *L) {
 	char *filename = strdup(luaL_checkstring(L, 1));
 	int cachesize = luaL_optint(L, 2, 64 << 20); // 64 MB limit default
 	char buf[15];
-	printf("cachesize: %s\n",readable_fs(cachesize,buf));
+	printf("## cachesize: %s\n",readable_fs(cachesize,buf));
 
 	PdfDocument *doc = (PdfDocument*) lua_newuserdata(L, sizeof(PdfDocument));
 

pdfreader.lua

@@ -8,7 +8,7 @@ function PDFReader:open(filename)
 	-- muPDF manages its own cache, set second parameter
 	-- to the maximum size you want it to grow
 	local ok
-	ok, self.doc = pcall(pdf.openDocument, filename, 64*1024*1024)
+	ok, self.doc = pcall(pdf.openDocument, filename, self.cache_document_size)
 	if not ok then
 		return false, self.doc -- will contain error message
 	end

unireader.lua

@@ -107,7 +107,7 @@ end
 
 -- open a file and its settings store
 -- tips: you can use self:loadSettings in open() method.
-function UniReader:open(filename, password)
+function UniReader:open(filename, cache_size)
 	return false
 end
 
@@ -149,7 +149,7 @@ end
 
 function UniReader:loadSettings(filename)
 	if self.doc ~= nil then
-		self.settings = DocSettings:open(filename)
+		self.settings = DocSettings:open(filename,self.cache_document_size)
 
 		local gamma = self.settings:readSetting("gamma")
 		if gamma then
@@ -169,8 +169,6 @@ function UniReader:loadSettings(filename)
 		self.globalzoom = self.settings:readSetting("globalzoom") or 1.0
 		self.globalzoommode = self.settings:readSetting("globalzoommode") or -1
 
-		self.doc:setCacheSize( self.cache_document_size )
-
 		return true
 	end
 	return false