znc: fix patches applying

git is hard. :-(

Reported-by: Kevin Darbyshire-Bryant <kevin@darbyshire-bryant.me.uk>
Fixes: 4629f043e0 ("znc: update to 1.7.2")
Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>

net/znc/patches/104-disable-empty-modules-check.patch

@@ -1,6 +1,6 @@
 --- a/src/main.cpp
 +++ b/src/main.cpp
-@@ -412,12 +412,14 @@ int main(int argc, char** argv) {
+@@ -422,12 +422,14 @@ int main(int argc, char** argv) {
                  "No modules found. Perhaps you didn't install ZNC properly?");
              CUtils::PrintError(
                  "Read https://wiki.znc.in/Installation for instructions.");