qt4: fixed to correctly parse the database package out of database/driver tuple

qt/qt4/qt4.conf

@@ -113,12 +113,13 @@ var_append confopt ' ' "-xmlpatterns"
 # Add database support for all installed databases.
 tuples="mysql:mysql postgresql:psql sqlite:sqlite sqlite2:sqlite2"
 for tuple in $tuples; do
-	tuplepkg=${tuple#:*}
+	tuplepkg=${tuple%:*}
 	tupledriver=${tuple#*:}
 
 	if pkginstalled $tuplepkg; then
 		pkgprefix -t $tuplepkg
 		var_append confopt " " "-plugin-sql-$tupledriver"
+
 	        for x in CXX GCC; do
 	                var_append ${x}_WRAPPER_APPEND ' ' "-L$( pkgprefix libdir $tuplepkg )"
 	        done
@@ -126,7 +127,6 @@ for tuple in $tuples; do
 	                var_append ${x}_WRAPPER_APPEND ' ' "-I$( pkgprefix includedir $tuplepkg )"
 	                var_append ${x}_WRAPPER_APPEND ' ' "-I$( pkgprefix includedir $tuplepkg )"
 		done
-
 	fi
 done