patch 9.0.1529: code style test doesn't check for space after "if"

Problem:    Code style test doesn't check for space after "if".
Solution:   Add a test for space.
diff --git a/src/regexp_nfa.c b/src/regexp_nfa.c
index 406a0e4..b7bfc86 100644
--- a/src/regexp_nfa.c
+++ b/src/regexp_nfa.c
@@ -3822,7 +3822,7 @@
 
 	} // switch(*p)
 
-    } // for(p = postfix; *p; ++p)
+    } // for (p = postfix; *p; ++p)
 
     if (nfa_calc_size == TRUE)
     {