ImageMagick is not part of RHEL 8+, add back conditionals

The ImageMagick and RHEL related conditionals were dropped in commit
d0508a7, but they have to stay, because only RHEL 7 had ImageMagick and
not any newer versions of RHEL. Currently it's only autotrace that is
pulling ImageMagick into ELN/RHEL 10.

Also update the github-#70 test so it's expected to fail when compiled
without ImageMagick support (due to lack of XPM support).

autotrace-0.31.9-expected-test-failure-no-imagemagick.patch

@@ -0,0 +1,31 @@
+diff -up autotrace-0.31.9/tests/github-#70/run.expected-failure-no-imagemagick autotrace-0.31.9/tests/github-#70/run
+--- autotrace-0.31.9/tests/github-#70/run.expected-failure-no-imagemagick	2023-01-24 14:53:57.278820241 +0100
++++ autotrace-0.31.9/tests/github-#70/run	2023-01-24 14:54:05.026741994 +0100
+@@ -4,6 +4,16 @@
+ 
+ DIR=$1
+ 
++# Check whether ImageMagick support is enabled and hence we support XPM
++autotrace -list-input-formats 2>&1 | grep xpm
++RESULT=$?
++
++if [ $RESULT -ne 0 ] ; then
++    XPM=0
++else
++    XPM=1
++fi
++
+ autotrace -report-progress -centerline -input-format XPM $DIR/lego_5.xpm -output-format svg -output-file $DIR/lego_5.svg
+ RESULT=$?
+ 
+@@ -11,5 +21,9 @@ if [ $RESULT -eq 0 ] && [ -s $DIR/lego_5
+     rm -f $DIR/lego_5.svg
+     ok
+ else
+-    fail
++    if [ $XPM -eq 0 ] ; then
++        expected_fail
++    else
++        fail
++    fi
+ fi

autotrace.spec

@@ -7,7 +7,11 @@ URL:            http://autotrace.sourceforge.net/
 Source0:	https://github.com/%{name}/%{name}/archive/%{version}/%{name}-%{version}.tar.gz
 # https://github.com/autotrace/autotrace/pull/105
 Patch0:	autotrace-0.31.9-pr105-ImageMagick7.patch
+Patch1:	autotrace-0.31.9-expected-test-failure-no-imagemagick.patch
+# No ImageMagick in RHEL 8 and future releases
+%if !(0%{?rhel} >= 8)
 BuildRequires:	ImageMagick-devel
+%endif
 BuildRequires:	autoconf
 BuildRequires:	automake
 BuildRequires:	gcc
@@ -36,7 +40,9 @@ Postscript, SVG, xfig, SWF, and others.
 Summary:        Header files for autotrace
 Requires:       %{name}%{?_isa} = %{version}-%{release}
 Requires:       pkgconfig
+%if !(0%{?rhel} >= 8)
 Requires:       ImageMagick-devel
+%endif
 Requires:       pstoedit-devel
 
 
@@ -50,7 +56,11 @@ This package contains header files and development libraries for autotrace.
 
 %build
 autoreconf -ivf
+%if ! ( 0%{?rhel} >= 8 )
+%configure --without-magick --disable-static
+%else
 %configure --enable-magick-readers --disable-static
+%endif
 make %{?_smp_mflags}