fix broken pkg_filenames

bin/epm-query_package

@@ -22,7 +22,7 @@ load_helper epm-search
 
 __epm_query_package()
 {
-	pkg_filenames="$*" quoted_args="$*" quiet=1 epm_query_package
+	(pkg_filenames="$*" quoted_args="$*" quiet=1 epm_query_package)
 }
 
 epm_query_package()
@@ -33,5 +33,5 @@ epm_query_package()
 	MGS=$(eval __epm_search_make_grep $quoted_args)
 	EXTRA_SHOWDOCMD=$MGS
 	# Note: get all packages list and do grep
-	eval "pkg_filenames='' epm_packages \"$(eval get_firstarg $quoted_args)\" $MGS"
+	(eval "pkg_filenames='' epm_packages \"$(eval get_firstarg $quoted_args)\" $MGS")
 }