separated bench module into benchfn and benchzstd

it shall be possible to use benchfn
without any dependency on zstd.

contrib/largeNbDicts/Makefile

@@ -28,14 +28,14 @@ default: largeNbDicts
 
 all : largeNbDicts
 
-largeNbDicts: util.o bench.o datagen.o xxhash.o largeNbDicts.c $(LIBZSTD)
+largeNbDicts: util.o benchfn.o datagen.o xxhash.o largeNbDicts.c $(LIBZSTD)
 	$(CC) $(CPPFLAGS) $(CFLAGS) $^ $(LDFLAGS) -o $@
 
 .PHONY: $(LIBZSTD)
 $(LIBZSTD):
 	$(MAKE) -C $(LIBDIR) libzstd.a CFLAGS="$(CFLAGS)"
 
-bench.o  : $(PROGDIR)/bench.c
+benchfn.o  : $(PROGDIR)/benchfn.c
 	$(CC) $(CPPFLAGS) $(CFLAGS) $^ -c
 
 datagen.o: $(PROGDIR)/datagen.c

contrib/largeNbDicts/largeNbDicts.c

@@ -24,7 +24,7 @@
 #include <assert.h>   /* assert */
 
 #include "util.h"
-#include "bench.h"
+#include "benchfn.h"
 #define ZSTD_STATIC_LINKING_ONLY
 #include "zstd.h"
 #include "zdict.h"
@@ -543,6 +543,7 @@ static int benchMem(slice_collection_t dstBlocks,
         BMK_runOutcome_t const outcome = BMK_benchTimedFn(benchState,
                                 decompress, &di,
                                 NULL, NULL,
+                                ZSTD_isError,
                                 dstBlocks.nbSlices,
                                 (const void* const *)srcBlocks.slicePtrs, srcBlocks.capacities,
                                 dstBlocks.slicePtrs, dstBlocks.capacities,