Modify Makefile clean rule to remove compilation artifacts by their extension (.exe, .out, ...), not their full name

Makefile

@@ -50,15 +50,10 @@ libtoastyfs.a: $(OFILES)
 
 clean:
 	rm -f          \
-		toastyfs.exe                      \
+		*.exe      \
-		toastyfs.out                      \
+		*.out      \
-		toastyfs_random_test.exe          \
+		*.a        \
-		toastyfs_random_test.out          \
+		*.gcov     \
-		toastyfs_random_test_coverage.exe \
-		toastyfs_random_test_coverage.out \
-		example_client.exe               \
-		example_client.out               \
-		libtoastyfs.a                     \
 		src/*.o    \
 		src/*.gcda \
 		src/*.gcno \

src/tcp.c

@@ -407,9 +407,10 @@ void tcp_set_tag(TCP *tcp, int conn_idx, int tag, bool unique)
 {
     assert(tag != -1);
 
-    if (unique)
+    if (unique) {
         for (int i = 0; i < tcp->num_conns; i++)
             assert(tcp->conns[i].tag != tag);
+    }
 
     tcp->conns[conn_idx].tag = tag;
 }