qtkeychain: Fixes Qt4 build. (#46085)

pkgs/development/libraries/qtkeychain/0001-Fixes-build-with-Qt4.patch

@@ -0,0 +1,25 @@
+From f72e5b67ee1137a0ccd57db5d077a197b01b3cdc Mon Sep 17 00:00:00 2001
+From: Samuel Dionne-Riel <samuel@dionne-riel.com>
+Date: Tue, 4 Sep 2018 23:19:29 -0400
+Subject: [PATCH] Fixes build with Qt4.
+
+---
+ keychain_unix.cpp | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/keychain_unix.cpp b/keychain_unix.cpp
+index 30b26c3..b27ebef 100644
+--- a/keychain_unix.cpp
++++ b/keychain_unix.cpp
+@@ -91,7 +91,7 @@ static bool isKwallet5Available()
+     // a wallet can be opened.
+ 
+     iface.setTimeout(500);
+-    QDBusMessage reply = iface.call(QStringLiteral("networkWallet"));
++    QDBusMessage reply = iface.call("networkWallet");
+     return reply.type() == QDBusMessage::ReplyMessage;
+ }
+ 
+-- 
+2.16.4
+

pkgs/development/libraries/qtkeychain/default.nix

@@ -18,6 +18,8 @@ stdenv.mkDerivation rec {
     sha256 = "0h4wgngn2yl35hapbjs24amkjfbzsvnna4ixfhn87snjnq5lmjbc"; # v0.9.1
   };
 
+  patches = if withQt5 then null else [ ./0001-Fixes-build-with-Qt4.patch ];
+
   cmakeFlags = [ "-DQT_TRANSLATIONS_DIR=share/qt/translations" ]
     ++ stdenv.lib.optional stdenv.isDarwin [
        # correctly detect the compiler