updated for version 7.3.788
Problem:    When only using patches build fails on missing nl.po.
Solution:   Create an empty nl.po file.
diff --git a/src/po/Makefile b/src/po/Makefile
index 2814b3f..09c8861 100644
--- a/src/po/Makefile
+++ b/src/po/Makefile
@@ -176,6 +176,10 @@
 
 converted: $(MOCONVERTED)
 
+# nl.po was added later, if it does not exist use an empty file.
+nl.po:
+	touch nl.po
+
 # Norwegian/Bokmal: "nb" is an alias for "no".
 # Copying the file is not efficient, but I don't know of another way to make
 # this work.