Remove xcalloc() and convert its callers to xzalloc(). About half of them

were using "1" as one of the arguments anyway, and as for the rest a multiply
and a push isn't noticeably bigger than pushing two arguments on the stack.

coreutils/cut.c

@@ -135,7 +135,7 @@ static void cut_line_by_chars(const char *line)
 {
 	int c, l;
 	/* set up a list so we can keep track of what's been printed */
-	char *printed = xcalloc(strlen(line), sizeof(char));
+	char *printed = xzalloc(strlen(line));
 
 	/* print the chars specified in each cut list */
 	for (c = 0; c < nlists; c++) {
@@ -172,7 +172,7 @@ static void cut_line_by_fields(char *line)
 	}
 
 	/* set up a list so we can keep track of what's been printed */
-	printed = xcalloc(strlen(line), sizeof(char));
+	printed = xzalloc(strlen(line));
 
 	/* process each list on this line, for as long as we've got a line to process */
 	for (c = 0; c < nlists && line; c++) {

coreutils/ls.c

@@ -300,7 +300,7 @@ static struct dnode **dnalloc(int num)
 	if (num < 1)
 		return (NULL);
 
-	p = (struct dnode **) xcalloc((size_t) num, (size_t) (sizeof(struct dnode *)));
+	p = (struct dnode **) xzalloc(num * sizeof(struct dnode *));
 	return (p);
 }
 

coreutils/sort.c

@@ -120,7 +120,7 @@ static struct sort_key *add_key(void)
 {
 	struct sort_key **pkey=&key_list;
 	while(*pkey) pkey=&((*pkey)->next_key);
-	return *pkey=xcalloc(1,sizeof(struct sort_key));
+	return *pkey = xzalloc(sizeof(struct sort_key));
 }
 
 #define GET_LINE(fp) (global_flags&FLAG_z) ? bb_get_chunk_from_file(fp,NULL) \