Merge branch 'master' of https://git.opencarp.org/openCARP/meshalyzer

src/IGBheader.h

@@ -5,6 +5,10 @@
 #include <zlib.h>
 #include <cstring>
 #include <assert.h>
+#include <cmath>
+#include <cstdio>
+#include <fstream>
+#include <cctype>
 #include <float.h>
 #include <limits>
 #include <algorithm>