--- dahdi_monitor.c.orig	2009-04-14 17:53:17.000000000 +0200
+++ dahdi_monitor.c	2009-04-14 17:55:07.000000000 +0200
@@ -343,7 +343,7 @@
 				fprintf(stderr, "Cannot specify option '%c' more than once.\n", opt);
 				exit(EXIT_FAILURE);
 			}
-			if ((ofh[MON_BRX] = fopen(optarg, "w")) < 0) {
+			if ((ofh[MON_BRX] = fopen(optarg, "w")) == NULL) {
 				fprintf(stderr, "Could not open %s for writing: %s\n", optarg, strerror(errno));
 				exit(EXIT_FAILURE);
 			}
@@ -359,7 +359,7 @@
 				fprintf(stderr, "Cannot specify option '%c' more than once.\n", opt);
 				exit(EXIT_FAILURE);
 			}
-			if ((ofh[MON_PRE_BRX] = fopen(optarg, "w")) < 0) {
+			if ((ofh[MON_PRE_BRX] = fopen(optarg, "w")) == NULL) {
 				fprintf(stderr, "Could not open %s for writing: %s\n", optarg, strerror(errno));
 				exit(EXIT_FAILURE);
 			}
@@ -376,7 +376,7 @@
 				fprintf(stderr, "Cannot specify option '%c' more than once.\n", opt);
 				exit(EXIT_FAILURE);
 			}
-			if ((ofh[MON_BRX] = fopen(optarg, "w")) < 0) {
+			if ((ofh[MON_BRX] = fopen(optarg, "w")) == NULL) {
 				fprintf(stderr, "Could not open %s for writing: %s\n", optarg, strerror(errno));
 				exit(EXIT_FAILURE);
 			}
@@ -393,7 +393,7 @@
 				fprintf(stderr, "Cannot specify option '%c' more than once.\n", opt);
 				exit(EXIT_FAILURE);
 			}
-			if ((ofh[MON_PRE_BRX] = fopen(optarg, "w")) < 0) {
+			if ((ofh[MON_PRE_BRX] = fopen(optarg, "w")) == NULL) {
 				fprintf(stderr, "Could not open %s for writing: %s\n", optarg, strerror(errno));
 				exit(EXIT_FAILURE);
 			}
@@ -411,7 +411,7 @@
 				fprintf(stderr, "Cannot specify option '%c' more than once.\n", opt);
 				exit(EXIT_FAILURE);
 			}
-			if ((ofh[MON_TX] = fopen(optarg, "w")) < 0) {
+			if ((ofh[MON_TX] = fopen(optarg, "w")) == NULL) {
 				fprintf(stderr, "Could not open %s for writing: %s\n", optarg, strerror(errno));
 				exit(EXIT_FAILURE);
 			}
@@ -428,7 +428,7 @@
 				fprintf(stderr, "Cannot specify option '%c' more than once.\n", opt);
 				exit(EXIT_FAILURE);
 			}
-			if ((ofh[MON_PRE_TX] = fopen(optarg, "w")) < 0) {
+			if ((ofh[MON_PRE_TX] = fopen(optarg, "w")) == NULL) {
 				fprintf(stderr, "Could not open %s for writing: %s\n", optarg, strerror(errno));
 				exit(EXIT_FAILURE);
 			}
@@ -446,7 +446,7 @@
 				fprintf(stderr, "Cannot specify option '%c' more than once.\n", opt);
 				exit(EXIT_FAILURE);
 			}
-			if ((ofh[MON_STEREO] = fopen(optarg, "w")) < 0) {
+			if ((ofh[MON_STEREO] = fopen(optarg, "w")) == NULL) {
 				fprintf(stderr, "Could not open %s for writing: %s\n", optarg, strerror(errno));
 				exit(EXIT_FAILURE);
 			}
@@ -463,7 +463,7 @@
 				fprintf(stderr, "Cannot specify option '%c' more than once.\n", opt);
 				exit(EXIT_FAILURE);
 			}
-			if ((ofh[MON_PRE_STEREO] = fopen(optarg, "w")) < 0) {
+			if ((ofh[MON_PRE_STEREO] = fopen(optarg, "w")) == NULL) {
 				fprintf(stderr, "Could not open %s for writing: %s\n", optarg, strerror(errno));
 				exit(EXIT_FAILURE);
 			}