some fixes

src/coreutils/dd/dd.c

@@ -89,7 +89,6 @@ int main(int argc, char **argv) {
 
 	off_t skip = 0;
 	off_t seek = 0;
-	off_t count = -1;
 
 	off_t bs = 0;
 	off_t ibs = 512;

src/coreutils/printenv/printenv.c

@@ -2,7 +2,6 @@
 #include <stdlib.h>
 #include <string.h>
 #include <unistd.h>
-char n_flag = '\n';
 
 int printvars(int len, char **names) {
 	int ret = 0;
@@ -14,7 +13,7 @@ int printvars(int len, char **names) {
 			continue;
 		}
 
-		printf("%s%c", val, n_flag);
+		printf("%s\n", val);
 	}
 
 	return ret;
@@ -23,15 +22,8 @@ int printvars(int len, char **names) {
 int main(int argc, char **argv, const char **envp) {
 	int opt;
 	while ((opt = getopt(argc, argv, "0")) != -1) {
-		switch (opt) {
-			case '0':
-				n_flag = '\0';
-				break;
-
-			default:
-				printf("printenv [var1 var2...]\n\t[-0 end each output line with NUL]\n");
-				return 0;
-		}
+		printf("printenv [var1 var2...]\n");
+		return 0;
 	}
 
 	argv += optind;
@@ -39,7 +31,7 @@ int main(int argc, char **argv, const char **envp) {
 
 	if (argc == 0)
 		while (*envp)
-			printf("%s%c", *envp++, n_flag);
+			printf("%s\n", *envp++);
 
 	else
 		return printvars(argc, argv);

src/loginutils/login/login.c

@@ -30,7 +30,7 @@ int hide_input(int fd, int flag) {
 }
 
 void login(const struct passwd *pw) {
-	char *shell = pw->pw_shell[0] == '\0' ? "/bin/sh" : pw->pw_shell;
+	char *shell = (pw->pw_shell[0] == '\0') ? "/bin/sh" : pw->pw_shell;
 
 	setenv("HOME", pw->pw_dir, 1);
 	setenv("SHELL", shell, 1);