use @screen-small var in grid.less

Per comment by @nextgenthemes on/in cd06c5baac64a366

diff --git a/less/grid.less b/less/grid.less
index a39d38b2e24d8de0d4d7b8fb21a35efdf6db8fe2..6de993c2a2d3241a26172690f310c011b7aca12f 100644 (file)
--- a/less/grid.less
+++ b/less/grid.less
@@ -31,7 +31,7 @@
 .generate-grid-columns(@grid-columns);
 
 // Then generate the larger grid classes via media query
-@media screen and (min-width: 768px) {
+@media screen and (min-width: @screen-small) {
   .generate-large-grid-columns(@grid-columns);
 }