Add a check to verify that the spell checker set as the default is enabled for build.

Signed-off-by: Slávek Banko <slavek.banko@axis.cz>

CMakeLists.txt

@@ -1262,7 +1262,11 @@ endif( WITH_HSPELL )
 
 
 ####" default spell checker #####################
+
 set( DEFAULT_SPELL_CHECKER "ISPELL" CACHE STRING "default spell checker" )
+if( NOT WITH_${DEFAULT_SPELL_CHECKER} )
+  tde_message_fatal( "Spell checker selected as default (${DEFAULT_SPELL_CHECKER}) is not enabled to build." )
+endif()
 
 
 ##### enable TDEIconLoader debugging ############