[MLIR] Fix release build: the definition for the FULL_LDBG macro was incorrect

Author: joker-eph

mlir/lib/Dialect/Transform/Interfaces/TransformInterfaces.cpp

@@ -28,7 +28,9 @@
 #define FULL_LDBG(X)                                                           \
   DEBUGLOG_WITH_STREAM_AND_TYPE(llvm::dbgs(), DEBUG_TYPE_FULL)
 #else
-#define FULL_LDBG(X)
+#define FULL_LDBG(X)                                                           \
+  for (bool _c = false; _c; _c = false)                                        \
+  ::llvm::nulls()
 #endif
 
 using namespace mlir;