Avoid some warnings.

apps/gendh.c

@@ -77,7 +77,6 @@
 static void MS_CALLBACK dh_cb(int p, int n, void *arg);
 int MAIN(int argc, char **argv)
 	{
-	char buffer[200];
 	DH *dh=NULL;
 	int ret=1,num=DEFBITS;
 	int g=2;

crypto/pkcs7/example.c

@@ -25,7 +25,7 @@ ASN1_UTCTIME *get_signed_time(PKCS7_SIGNER_INFO *si)
 	return NULL;
 	}
 	
-static int signed_string_nid= -1;
+static signed_string_nid= -1;
 
 void add_signed_string(PKCS7_SIGNER_INFO *si, char *str)
 	{