ZSTD_compress_usingCDict() correctly provides original size by default in frame header

Fixed dictionary examples

examples/Makefile

@@ -56,4 +56,8 @@ test: all
 	./simple_compression tmp
 	@echo starting simple_decompression
 	./simple_decompression tmp.zst
+	@echo dictionary compression
+	./dictionary_compression tmp README.md
+	@echo dictionary decompression
+	./dictionary_decompression tmp.zst README.md
 	@echo tests completed

examples/dictionary_compression.c

@@ -165,4 +165,5 @@ int main(int argc, const char** argv)
 
     ZSTD_freeCDict(dictPtr);
     printf("All %u files compressed. \n", argc-2);
+    return 0;
 }

examples/dictionary_decompression.c

@@ -135,4 +135,5 @@ int main(int argc, const char** argv)
 
     ZSTD_freeDDict(dictPtr);
     printf("All %u files correctly decoded (in memory) \n", argc-2);
+    return 0;
 }