Don't unnecessarily call alarm when duration is zero

.gitignore

@@ -1 +1,2 @@
 herbe
+.ccls-cache

TODO.md

@@ -0,0 +1,4 @@
+* Handle multiple notifications at the same time
+* Properly handle duration = 0
+* Keyboard shortcut to dismiss and accept notifications (also mouse)
+* Properly print new lines

config.h

@@ -13,4 +13,4 @@ static const unsigned int pos_y = 60;
 enum corners { TOP_LEFT, TOP_RIGHT, BOTTOM_LEFT, BOTTOM_RIGHT };
 enum corners corner = TOP_RIGHT;
 
-static const unsigned int duration = 5; /* in seconds */
+static const unsigned int duration = 5; /* in seconds */

herbe.c

@@ -67,7 +67,9 @@ int main(int argc, char *argv[])
 		die("Usage: %s body", argv[0]);
 
 	signal(SIGALRM, expire);
-	alarm(duration);
+
+	if (duration != 0)
+		alarm(duration);
 
 	display = XOpenDisplay(0);
 
@@ -165,4 +167,4 @@ int main(int argc, char *argv[])
 	XCloseDisplay(display);
 
 	exit(EXIT_SUCCESS);
-}
+}