credoc fix: load metadata info after document is rendered

frontend/document/credocument.lua

@@ -101,6 +101,9 @@ end
 
 function CreDocument:loadDocument()
 	self._document:loadDocument(self.file)
+	if not self.info.has_pages then
+		self.info.doc_height = self._document:getFullHeight()
+	end
 end
 
 function CreDocument:drawCurrentView(target, x, y, rect, pos)

frontend/document/document.lua

@@ -112,9 +112,6 @@ end
 
 function Document:_readMetadata()
 	self.info.number_of_pages = self._document:getPages()
-	if not self.info.has_pages then
-		self.info.doc_height = self._document:getFullHeight()
-	end
 	return true
 end