fix: correct the use of variables

Author: lc-soft

src/font/fontlibrary.c

@@ -628,7 +628,7 @@ static int LCUIFont_LoadFileEx(LCUI_FontEngine *engine, const char *file)
 	if (!engine) {
 		return -1;
 	}
-	num_fonts = fontlib.engine->open(file, &fonts);
+	num_fonts = engine->open(file, &fonts);
 	if (num_fonts < 1) {
 		Logger_Debug("[font] failed to load file: %s\n", file);
 		return -2;

src/graph.c

@@ -742,7 +742,7 @@ int Graph_Create(LCUI_Graph *graph, unsigned width, unsigned height)
 		_DEBUG_MSG("graph size is too large!");
 		abort();
 	}
-	if (width < 1 || width < 1) {
+	if (width < 1 || height < 1) {
 		Graph_Free(graph);
 		return -1;
 	}