Fix typo

Author: robocoder

src/Compiler.php

@@ -316,15 +316,17 @@ protected function makeOutputBlock($type, $selectors = null)
         $out->parent       = $this->scope;
         $out->selectors    = $selectors;
         $out->depth        = $this->env->depth;
+
         if ($this->env->block instanceof Block) {
             $out->sourceName   = $this->env->block->sourceName;
             $out->sourceLine   = $this->env->block->sourceLine;
             $out->sourceColumn = $this->env->block->sourceColumn;
         } else {
             $out->sourceName   = null;
             $out->sourceLine   = null;
-            $out->sourceColum  = null;
+            $out->sourceColumn = null;
         }
+
         return $out;
     }