tree-wide: assorted coccinelle fixes

src/cryptsetup/cryptsetup-generator.c

@@ -378,14 +378,13 @@ static int create_disk(
                 else
                         fprintf(f, "Requires=%s\n", unit);
 
-                if (umount_unit) {
+                if (umount_unit)
                         fprintf(f,
                                 "Wants=%s\n"
                                 "Before=%s\n",
                                 umount_unit,
                                 umount_unit
                         );
-                }
         }
 
         if (!nofail)

src/cryptsetup/cryptsetup.c

@@ -832,10 +832,9 @@ static int run(int argc, char *argv[]) {
         if (argc <= 1)
                 return help();
 
-        if (argc < 3) {
-                log_error("This program requires at least two arguments.");
-                return -EINVAL;
-        }
+        if (argc < 3)
+                return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
+                                       "This program requires at least two arguments.");
 
         log_setup_service();