fix comment


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34395 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Transforms/IPO/StripDeadPrototypes.cpp b/lib/Transforms/IPO/StripDeadPrototypes.cpp
index d433064..7d03ae6 100644
--- a/lib/Transforms/IPO/StripDeadPrototypes.cpp
+++ b/lib/Transforms/IPO/StripDeadPrototypes.cpp
@@ -49,7 +49,7 @@
     }
   }
 
-  // Erase dead function prototypes.
+  // Erase dead global var prototypes.
   for (Module::global_iterator I = M.global_begin(), E = M.global_end();
        I != E; ) {
     GlobalVariable *GV = I++;