Change calls to rint into lrint avoiding conversion warnings

Using gcc option "-Wfloat-conversion" is useful to catch
potential conversion errors (where lrint should be used).
rint returns double and still raises the same warning,
this is why this change updates all rint calls to lrint.
In few places, where input type is a float, corresponding
lrinf is used.

Signed-off-by: Jeremie Guichard <djebrest@gmail.com>

core/profile.c

@@ -760,7 +760,7 @@ static int sac_between(struct dive *dive, struct plot_data *first, struct plot_d
 	pressuretime /= 60;
 
 	/* SAC = mliter per minute */
-	return rint(airuse / pressuretime);
+	return lrint(airuse / pressuretime);
 }
 
 /*