Make it build on FreeBSD 7.

There's a call to mkdtemp(), which is supposed to be in stdlib.h. However,
until FreeBSD 8 the definition was only in unistd.h, so we need to include that
header for 7.

graphics/gwenview-kde4/Makefile

@@ -30,4 +30,11 @@ QT_COMPONENTS=	dbus qmake_build moc_build uic_build rcc_build
 USE_XZ=	yes
 MAKE_JOBS_SAFE=	yes
 
-.include <bsd.port.mk>
+.include <bsd.port.pre.mk>
+
+# mkdtemp() is not defined in stdlib.h in FreeBSD 7.
+.if ${OSVERSION} < 800000
+EXTRA_PATCHES=	${FILESDIR}/extra-patch-importer__fileutils.cpp
+.endif
+
+.include <bsd.port.post.mk>

graphics/gwenview-kde4/files/extra-patch-importer__fileutils.cpp

@@ -0,0 +1,10 @@
+--- importer/fileutils.cpp~	2012-05-30 19:27:44.000000000 -0300
++++ importer/fileutils.cpp	2012-05-30 19:27:57.000000000 -0300
+@@ -39,6 +39,7 @@
+ #include <errno.h>
+ #include <stdlib.h>
+ #include <string.h>
++#include <unistd.h>
+ 
+ namespace Gwenview
+ {