Merge pull request #100 from input-output-hk/fraser-iohk/fix-invariant-checks

strict-stm: Fix typo'd checktvarinvariant CPP flag

Author: coot

strict-stm/strict-stm.cabal

@@ -70,4 +70,4 @@ library
     ghc-options: -fno-ignore-asserts
 
   if flag(checktvarinvariant)
-    cpp-options: -DCHECK_TVAR_INVARIAN
+    cpp-options: -DCHECK_TVAR_INVARIANT