grid: checks for $grid-columns > 0 (#30605)

Co-authored-by: Martijn Cuppens <martijn.cuppens@gmail.com>

scss/mixins/_grid.scss

@@ -85,6 +85,7 @@
         @include make-col-auto();
       }
 
+      @if $columns > 0 {
         @for $i from 1 through $columns {
           .col#{$infix}-#{$i} {
             @include make-col($i, $columns);
@@ -99,6 +100,7 @@
             }
           }
         }
+      }
 
       // Gutters
       //