usr.bin/make reduce diffs in var_modify.c from FreeBSD

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--- var_modify.c	13 Nov 2004 00:06:16 -0000	1.1
+++ var_modify.c	27 Nov 2004 13:44:25 -0000
@@ -1,4 +1,5 @@
 /*
+ * Copyright (c) 2002 Juli Mallett.
  * Copyright (c) 1988, 1989, 1990, 1993
  *	The Regents of the University of California.  All rights reserved.
  * Copyright (c) 1989 by Berkeley Softworks
@@ -69,7 +66,7 @@
     char *slash;
 
     slash = strrchr (word, '/');
-    if (slash != (char *)NULL) {
+    if (slash != NULL) {
 	if (addSpace) {
 	    Buf_AddByte (buf, (Byte)' ');
 	}
@@ -115,7 +112,7 @@
     }
 
     slash = strrchr (word, '/');
-    if (slash != (char *)NULL) {
+    if (slash != NULL) {
 	*slash++ = '\0';
 	Buf_AddBytes (buf, strlen(slash), (Byte *)slash);
 	slash[-1] = '/';
@@ -145,7 +142,7 @@
     char *dot;
 
     dot = strrchr (word, '.');
-    if (dot != (char *)NULL) {
+    if (dot != NULL) {
 	if (addSpace) {
 	    Buf_AddByte (buf, (Byte)' ');
 	}
@@ -182,7 +179,7 @@
     }
 
     dot = strrchr (word, '.');
-    if (dot != (char *)NULL) {
+    if (dot != NULL) {
 	*dot = '\0';
 	Buf_AddBytes (buf, strlen (word), (Byte *)word);
 	*dot = '.';
@@ -212,7 +209,7 @@
 Boolean
 VarMatch (const char *word, Boolean addSpace, Buffer buf, void *pattern)
 {
-    if (Str_Match(word, (char *) pattern)) {
+    if (Str_Match(word, pattern)) {
 	if (addSpace) {
 	    Buf_AddByte(buf, (Byte)' ');
 	}
@@ -280,7 +277,7 @@
 Boolean
 VarNoMatch (const char *word, Boolean addSpace, Buffer buf, void *pattern)
 {
-    if (!Str_Match(word, (char *) pattern)) {
+    if (!Str_Match(word, pattern)) {
 	if (addSpace) {
 	    Buf_AddByte(buf, (Byte)' ');
 	}
@@ -411,7 +408,7 @@
 	    origSize = Buf_Size(buf);
 	    while (!done) {
 		cp = strstr(word, pattern->lhs);
-		if (cp != (char *)NULL) {
+		if (cp != NULL) {
 		    if (addSpace && (((cp - word) + pattern->rightLen) != 0)){
 			Buf_AddByte(buf, (Byte)' ');
 			addSpace = FALSE;

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