[flang] Fix a warning

This patch fixes:

  flang/lib/Lower/ConvertExpr.cpp:2733:14: error: variable
  'callNumResults' set but not used
  [-Werror,-Wunused-but-set-variable]

diff --git a/flang/lib/Lower/ConvertExpr.cpp b/flang/lib/Lower/ConvertExpr.cpp
index 634244c..a180553 100644 (file)
--- a/flang/lib/Lower/ConvertExpr.cpp
+++ b/flang/lib/Lower/ConvertExpr.cpp
@@ -2794,6 +2794,7 @@ public:
     // function return value.
     assert(callNumResults == 1 &&
            "Expected exactly one result in FUNCTION call");
+    (void)callNumResults;
 
     // Call a BIND(C) function that return a char.
     if (caller.characterize().IsBindC() &&