glsl2: Fix spelling of "sentinel."
diff --git a/src/glsl/ir_function_inlining.cpp b/src/glsl/ir_function_inlining.cpp
index 9daffeb..77c264f 100644
--- a/src/glsl/ir_function_inlining.cpp
+++ b/src/glsl/ir_function_inlining.cpp
@@ -96,7 +96,7 @@
 	 /* un-valued return has to be the last return, or we shouldn't
 	  * have reached here. (see can_inline()).
 	  */
-	 assert(!ret->next->is_tail_sentinal());
+	 assert(!ret->next->is_tail_sentinel());
 	 ret->remove();
       }
    }