Bug 8743 follow-up, throw a more explanatory error message

When testing bug 8743, I discovered a missing index in my authority file.
The error message was
"CCL parsing error (10014) Unknown qualifier ZOOM"

which is not very helpfull because it does not show the query that was made.
This patch add the query itself after the zebra error

C4/Search.pm

@@ -248,7 +248,7 @@ sub SimpleSearch {
                   . $@->code() . ") "
                   . $@->addinfo() . " "
                   . $@->diagset();
-                warn $error;
+                warn $error." for query: $query";
                 return ( $error, undef, undef );
             }
         }