missing isnormal.h from Makefile_insert

diff --git a/src/Makefile_insert b/src/Makefile_insert
index 36c6f3c3217b9deb6f90ddf83a9076c5fa849041..d109b171bc3a00bf80d33a4f812978ece6359b8b 100644 (file)
--- a/src/Makefile_insert
+++ b/src/Makefile_insert
@@ -83,6 +83,7 @@ libinkpre_a_SOURCES = \
        inkscape.cpp inkscape.h inkscape-private.h      \
        interface.cpp interface.h       \
        isnan.h \
+       isnormal.h \
        knot-enums.h    \
        knot-holder-entity.h    \
        knot.cpp knot.h \