pkg/49551: Need to enclose HAVE_BOOLEAN in #ifndef/#endif

[krishnan.n%gai.co.in@localhost]

>Number:         49551
>Category:       pkg
>Synopsis:       Need to enclose HAVE_BOOLEAN in #ifndef/#endif
>Confidential:   no
>Severity:       non-critical
>Priority:       medium
>Responsible:    pkg-manager
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Fri Jan 09 15:55:00 +0000 2015
>Originator:     Krishnan
>Release:        www/netsurf
>Organization:
gai Technologes Pvt Ltd
>Environment:
NetBSD adharaz 6.1.5 NetBSD 6.1.5 (GENERIC) amd64
>Description:
Building netsurf broke with 'boolean' redefined error:

/usr/pkgsrc/www/netsurf/work/.buildlink/include/libmng_types.h:205:13: error: redefinition of typedef 'boolean'
/usr/pkgsrc/www/netsurf/work/.buildlink/include/jmorecfg.h:313:13: note: previous declaration of 'boolean' was here

>How-To-Repeat:
cd $PKGSRD/www/netsurf; make
>Fix:
diff --git a/usr/pkg/include/libmng_types.h b/usr/pkg/include/libmng_types.h
index 09592a5..3f4148a 100644
--- a/usr/pkg/include/libmng_types.h
+++ b/usr/pkg/include/libmng_types.h
@@ -201,9 +201,11 @@
 #define JPEG_INTERNAL_OPTIONS          /* for RGB_PIXELSIZE */
 /* There has been a change in jpeg-9 : */
 #ifndef _WIN32
-#define HAVE_BOOLEAN
+#  ifndef BOOLEAN
+#    define HAVE_BOOLEAN
 typedef int boolean;
 #endif
+#endif
 #include <jpeglib.h>
 #endif /* MNG_INCLUDE_IJG6B */