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/os_amiga.c b/src/os_amiga.c
index bc4ecc9..d09974f 100644
--- a/src/os_amiga.c
+++ b/src/os_amiga.c
@@ -921,8 +921,8 @@
 	struct PathNode *head = DupCmdPathList(NULL);
 
 	// For each entry, recur to check for executable.
-	for(struct PathNode *tail = head; !exe && tail;
-		tail = (struct PathNode *) BADDR(tail->pn_Next))
+	for (struct PathNode *tail = head; !exe && tail;
+			       tail = (struct PathNode *) BADDR(tail->pn_Next))
 	{
 	    SetCurrentDir(tail->pn_Lock);
 	    exe = mch_can_exe(name, path, 0);