* reorganize headers in filters

src/filters/filter.h

@@ -4,7 +4,14 @@
  * it under the terms of the GNU General Public License version 2 as
  * published by the Free Software Foundation.
  */
+#if defined(__linux__)
+#include <alloca.h>
+#endif
+#include <assert.h>
 #include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
 
 #define ID_MAX 32
 #define PATTERN_MAX 256

src/filters/pcre.c

@@ -4,12 +4,6 @@
  * it under the terms of the GNU General Public License version 2 as
  * published by the Free Software Foundation.
  */
-#include <alloca.h>
-#include <assert.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-
 #include "filter.h"
 
 #include <pcre.h>

src/filters/preg.c

@@ -4,12 +4,6 @@
  * it under the terms of the GNU General Public License version 2 as
  * published by the Free Software Foundation.
  */
-#include <alloca.h>
-#include <assert.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-
 #include "filter.h"
 
 #include <regex.h>