Coding style: remove Java-style function definition

Remove a few cases of
	void fun() {
		...
	}

While touching these functions, fix a few other whitespace
coding style violations.

Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>

core/errorhelper.c

@@ -26,6 +26,7 @@ int report_error(const char *fmt, ...)
 	return -1;
 }
 
-void set_error_cb(void(*cb)(char *)) {
+void set_error_cb(void(*cb)(char *))
+{
 	error_cb = cb;
 }