tipc: split variable assignments out of conditional expressions

Cleans up TIPC's source code to eliminate assigning values to variables
within conditional expressions, improving code readability and reducing
warnings from various code checker tools.

These changes are purely cosmetic and do not alter the operation of TIPC
in any way.

Signed-off-by: Allan Stephens <Allan.Stephens@windriver.com>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/tipc/bearer.c b/net/tipc/bearer.c
index 040f3ed..e9136f0 100644
--- a/net/tipc/bearer.c
+++ b/net/tipc/bearer.c
@@ -251,7 +251,8 @@
 	/* ensure all component parts of bearer name are present */
 
 	media_name = name_copy;
-	if ((if_name = strchr(media_name, ':')) == NULL)
+	if_name = strchr(media_name, ':');
+	if (if_name == NULL)
 		return 0;
 	*(if_name++) = 0;
 	media_len = if_name - media_name;