Index: unify.c
===================================================================
--- unify.c	1997/09/06 06:05:22	1.1
+++ unify.c	2000/03/28 23:50:27	1.2
@@ -7,9 +7,9 @@
 */
 
 #include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
 
-extern char *malloc();
-
 #define FIND_NEXT	0
 #define PARSE_UNIDIFF	1
 #define UNI_LINES	2
@@ -90,7 +90,7 @@
 	    }
 	} else {
 	    if (fp_in != stdin) {
-		fprintf(stderr, "Only one filename allowed.\n", *argv);
+		fprintf(stderr, "Only one filename allowed.\n");
 		exit(1);
 	    }
 	    if ((fp_in = fopen(*argv, "r")) == NULL) {
@@ -144,10 +144,10 @@
 		    }
 		}
 		if (!patch_format) {
-		    if (output_type == 1 && (*buf == '+'
-		      || *buf == '-' && star_dash_plus != '*')
-		     || output_type == 2 && (*buf == '*'
-		      || *buf == '-' && star_dash_plus == '*')) {
+		    if ((output_type == 1 &&
+			 (*buf == '+' || (*buf == '-' && star_dash_plus != '*')))
+			|| (output_type == 2 &&
+			    (*buf == '*' || (*buf == '-' && star_dash_plus == '*')))) {
 			printf("%s", buf);
 		    } else if (*buf == '*' || *buf == '+') {
 			printf("---%s", buf+3);