Corrected inverted logic in %pre/%post scriptlets

Signed-off-by: Al Stone <ahs3@redhat.com>

acpica-tools.spec

@@ -1,6 +1,6 @@
 Name:           acpica-tools
 Version:        20180508
-Release:        1%{?dist}
+Release:        2%{?dist}
 Summary:        ACPICA tools for the development and debug of ACPI tables
 
 Group:          Development/Languages
@@ -201,21 +201,21 @@ fi
 cd ..
 
 %pre
-if [ ! -e %{_bindir}/acpixtract-acpica ]
+if [ -e %{_bindir}/acpixtract-acpica ]
 then
     alternatives --remove acpixtract %{_bindir}/acpixtract-acpica
 fi
-if [ ! -e %{_bindir}/acpidump-acpica ]
+if [ -e %{_bindir}/acpidump-acpica ]
 then
     alternatives --remove acpidump %{_bindir}/acpidump-acpica
 fi
 
 %postun
-if [ ! -e %{_bindir}/acpixtract-acpica ]
+if [ -e %{_bindir}/acpixtract-acpica ]
 then
     alternatives --remove acpixtract %{_bindir}/acpixtract-acpica
 fi
-if [ ! -e %{_bindir}/acpidump-acpica ]
+if [ -e %{_bindir}/acpidump-acpica ]
 then
     alternatives --remove acpidump %{_bindir}/acpidump-acpica
 fi
@@ -229,6 +229,10 @@ fi
 
 
 %changelog
+* Tue May 22 2018 Al Stone <ahs3@redhat.com> - 20180508-2
+- %%pre and %%post scriptlets fail -- stupid thinko where I inadvertently
+  tested for alternatives not existing, vs existing 
+
 * Tue May 15 2018 Al Stone <ahs3@redhat.com> - 20180508-1
 - Update to 20180508 source tree, including patch refeshes. Closes BZ#1544048
 - acpidump/acpixtract no longer have alternatives, so remove the scriptlets