The word `dependent' has no `a'.

llvm-svn: 8030
diff --git a/llvm/lib/CodeGen/RegAlloc/RegClass.h b/llvm/lib/CodeGen/RegAlloc/RegClass.h
index aa5b29d..f99160d 100644
--- a/llvm/lib/CodeGen/RegAlloc/RegClass.h
+++ b/llvm/lib/CodeGen/RegAlloc/RegClass.h
@@ -17,7 +17,7 @@
 //-----------------------------------------------------------------------------
 // Class RegClass
 //
-//   Implements a machine independant register class. 
+//   Implements a machine independent register class. 
 //
 //   This is the class that contains all data structures and common algos
 //   for coloring a particular register class (e.g., int class, fp class).