[gimp] Bug 787019 - Gimp 2.9.6 misses -lm in libgimpbase/Makefile.am

[Michael Natterer <mitch src gnome org>]

commit ac7d8aa98df30cb9747041b2a61efe51dfdf22da
Author: Michael Natterer <mitch gimp org>
Date:   Thu Aug 31 21:35:00 2017 +0200

    Bug 787019 - Gimp 2.9.6 misses -lm in libgimpbase/Makefile.am
    
    Apply patch from Sebastian Pipping which adds -lm.

 libgimpbase/Makefile.am |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/libgimpbase/Makefile.am b/libgimpbase/Makefile.am
index a1a6719..a836498 100644
--- a/libgimpbase/Makefile.am
+++ b/libgimpbase/Makefile.am
@@ -22,6 +22,7 @@ uninstall-libtool-import-lib:
        -rm $(DESTDIR)$(libdir)/libgimpbase-$(GIMP_API_VERSION).dll.a
        -rm $(DESTDIR)$(libdir)/gimpbase.def
 else
+libm = -lm
 install-libtool-import-lib:
 uninstall-libtool-import-lib:
 endif
@@ -169,6 +170,7 @@ EXTRA_libgimpbase_@GIMP_API_VERSION@_la_DEPENDENCIES = $(gimpbase_def)
 libgimpbase_@GIMP_API_VERSION@_la_LIBADD = \
        $(GIO_LIBS)     \
        $(GEXIV2_LIBS)  \
+       $(libm)         \
        $(ole32_lib)
 
 install-data-local: install-ms-lib install-libtool-import-lib