fix a bug when initialize value

qrencode-1.0.2-1.rockspec

+package = "qrencode"
+version = "0.0.1-1"
+source = {
+    url = "qr.tar.gz",
+    file = "qr.tar.gz"
+}
+description = {
+    summary = "qrencode is a wrapper of libqrencode with libpng for lua",
+    detailed = [[
+        qrencode is a wrapper of libqrencode with libpng for lua.
+    ]],
+    license = "MIT/X11",
+    homepage = "http://fukuchi.org/works/qrencode/"
+}
+dependencies = {
+    "lua >= 5.1"
+}
+build = {
+    type = "builtin",
+    modules = {
+        qrencode = {
+            sources = { "qrencode.c" },
+            libraries = { "png", "qrencode" },
+        }
+    },
+}
+