patch 9.0.1234: the code style has to be checked manually

Problem:    The code style has to be checked manually.
Solution:   Add basic code style checks in a test.  Fix or avoid uncovered
            problems.

src/crypt_zip.c

@@ -60,7 +60,8 @@ make_crc_tab(void)
 /*
  * Return the next byte in the pseudo-random sequence.
  */
-#define DECRYPT_BYTE_ZIP(keys, t) { \
+#define DECRYPT_BYTE_ZIP(keys, t) \
+{ \
     short_u temp = (short_u)keys[2] | 2; \
     t = (int)(((unsigned)(temp * (temp ^ 1U)) >> 8) & 0xff); \
 }