Minor fixes for bitwriter unit test.

src/test_libFLAC/bitwriter.c

 /* test_libFLAC - Unit tester for libFLAC
  * Copyright (C) 2000-2009  Josh Coalson
- * Copyright (C) 2011-2016  Xiph.Org Foundation
+ * Copyright (C) 2011-2018  Xiph.Org Foundation
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License
@@ -112,9 +112,8 @@ FLAC__bool test_bitwriter(void)
 	printf("OK\n");
 
 	printf("testing init... ");
-	FLAC__bitwriter_init(bw);
-	if(0 == bw) {
-		printf("FAILED, returned NULL\n");
+	if(!FLAC__bitwriter_init(bw)) {
+		printf("FAILED, returned false\n");
 		return false;
 	}
 	printf("OK\n");
@@ -135,19 +134,14 @@ FLAC__bool test_bitwriter(void)
 	printf("OK\n");
 
 	printf("testing init... ");
-	FLAC__bitwriter_init(bw);
-	if(0 == bw) {
-		printf("FAILED, returned NULL\n");
+	if(!FLAC__bitwriter_init(bw)) {
+		printf("FAILED, returned false\n");
 		return false;
 	}
 	printf("OK\n");
 
 	printf("testing clear... ");
 	FLAC__bitwriter_clear(bw);
-	if(0 == bw) {
-		printf("FAILED, returned NULL\n");
-		return false;
-	}
 	printf("OK\n");
 
 	printf("testing delete... ");
@@ -166,10 +160,11 @@ FLAC__bool test_bitwriter(void)
 	printf("OK\n");
 
 	printf("testing init... ");
-	ok = FLAC__bitwriter_init(bw);
-	printf("%s\n", ok?"OK":"FAILED");
-	if(!ok)
+	if(!FLAC__bitwriter_init(bw)) {
+		printf("FAILED, returned false\n");
 		return false;
+	}
+	printf("OK\n");
 
 	printf("testing clear... ");
 	FLAC__bitwriter_clear(bw);
@@ -204,7 +199,7 @@ FLAC__bool test_bitwriter(void)
 	bits = 152 - words*FLAC__BITS_PER_WORD;
 
 	if(bw->words != words) {
-		printf("FAILED byte count %u != %u\n", bw->words, words);
+		printf("FAILED word count %u != %u\n", bw->words, words);
 		FLAC__bitwriter_dump(bw, stdout);
 		return false;
 	}
@@ -237,7 +232,7 @@ FLAC__bool test_bitwriter(void)
 	test_pattern1[words] <<= 6;
 	test_pattern1[words] |= 0x3d;
 	if(bw->words != words) {
-		printf("FAILED byte count %u != %u\n", bw->words, words);
+		printf("FAILED word count %u != %u\n", bw->words, words);
 		FLAC__bitwriter_dump(bw, stdout);
 		return false;
 	}