istream_ioparser test: Include algorithm header

fanc999-1 · kjellahl · commit ac10f92ec63a · 2022-06-23T14:58:38.000+02:00
Some Visual Studio releases require it to be included to use std::min().
diff --git a/tests/istream_ioparser/main.cc b/tests/istream_ioparser/main.cc
@@ -17,6 +17,7 @@
 
 #include <libxml++/libxml++.h>
 
+#include <algorithm>
 #include <cassert>
 #include <cstdlib>
 #include <cstring>
