ogre versions lower than 1.9 can not be detected since find_package w…

…ill skip them

Signed-off-by: Jose Luis Rivero <jrivero@osrfoundation.org>

CMakeLists.txt

@@ -66,12 +66,12 @@ ign_find_package(IgnOGRE VERSION 1.9.0
   REQUIRED_BY ogre
   PRIVATE_FOR ogre)
 
-# Ogre versions different than 1.9.x are not officialy supported.
+# Ogre versions greater than 1.9.x are not officialy supported.
 # Display a warning for the users on this setup unless they provide
 # USE_UNOFFICIAL_OGRE_VERSIONS flag
 if (NOT USE_UNOFFICIAL_OGRE_VERSIONS)
-  if ((${OGRE_VERSION} VERSION_LESS 1.9.0) OR (${OGRE_VERSION} VERSION_GREATER_EQUAL 1.10.0))
-    IGN_BUILD_WARNING("Ogre 1.x versions different than 1.9 are not officially supported."
+  if (${OGRE_VERSION} VERSION_GREATER_EQUAL 1.10.0)
+    IGN_BUILD_WARNING("Ogre 1.x versions greater than 1.9 are not officially supported."
                       "The software might compile and even work but support from upstream"
                       "could be reduced to accepting patches for newer versions")
   endif()