Fixed phpdbg build without --enable-zend-signals

Author: dstogov

Zend/Zend.m4

@@ -370,10 +370,10 @@ AC_CHECK_FUNCS(mremap)
 
 
 AC_ARG_ENABLE(zend-signals,
-[  --enable-zend-signals   Use zend signal handling],[
+[  --disable-zend-signals  whether to enable zend signal handling],[
   ZEND_SIGNALS=$enableval
 ],[
-  ZEND_SIGNALS=no
+  ZEND_SIGNALS=yes
 ])  
 
 AC_CHECK_FUNC(sigaction, [

sapi/phpdbg/phpdbg.h

@@ -47,6 +47,9 @@
 #include "zend_stream.h"
 #ifndef _WIN32
 #	include "zend_signal.h"
+# if !defined(ZEND_SIGNALS) && defined(HAVE_SIGNAL_H)
+#  include <signal.h>
+# endif
 #endif
 #include "SAPI.h"
 #include <fcntl.h>