Patch for Ruby 1.9 compatibility, backport from upstream SVN.

--- ext/fcgi/fcgi.c	2006-06-25 06:06:42.000000000 +0200
+++ ext/fcgi/fcgi.c.r47	2008-12-02 10:37:47.000000000 +0100
@@ -17,6 +17,16 @@
 #include "fcgiapp.h"
 #endif
 
+#ifndef RARRAY_PTR
+#define RARRAY_LEN(ary) (RARRAY(ary)->len)
+#define RARRAY_PTR(ary) (RARRAY(ary)->ptr)
+#endif
+
+#ifndef RSTRING_PTR
+#define RSTRING_LEN(str) (RSTRING(str)->len)
+#define RSTRING_PTR(str) (RSTRING(str)->ptr)
+#endif
+
 static VALUE cFCGI;
 static VALUE eFCGIError;
 static VALUE cFCGIStream;
@@ -222,7 +232,7 @@
   rb_secure(4);
   Data_Get_Struct(self, FCGX_Stream, stream);
   str = rb_obj_as_string(str);
-  len = FCGX_PutStr(RSTRING(str)->ptr, RSTRING(str)->len, stream);
+  len = FCGX_PutStr(RSTRING_PTR(str), RSTRING_LEN(str), stream);
   if (len == EOF) CHECK_STREAM_ERROR(stream);
   return INT2NUM(len);
 }
@@ -271,8 +281,8 @@
   VALUE tmp;
   int i;
 
-  for (i=0; i<RARRAY(ary)->len; i++) {
-    tmp = RARRAY(ary)->ptr[i];
+  for (i=0; i<RARRAY_LEN(ary); i++) {
+    tmp = RARRAY_PTR(ary)[i];
     if (rb_inspecting_p(tmp)) {
       tmp = rb_str_new2("[...]");
     }
@@ -305,7 +315,7 @@
     }
     line = rb_obj_as_string(line);
     fcgi_stream_write(out, line);
-    if (RSTRING(line)->ptr[RSTRING(line)->len-1] != '\n') {
+    if (RSTRING_PTR(line)[RSTRING_LEN(line)-1] != '\n') {
       fcgi_stream_write(out, rb_default_rs);
     }
   }
@@ -379,7 +389,7 @@
     rb_str_cat(str, buff, strlen(buff));
     if (strchr(buff, '\n')) break;
   }
-  if (RSTRING(str)->len > 0)
+  if (RSTRING_LEN(str) > 0)
     return str;
   else
     return Qnil;
@@ -507,7 +517,8 @@
 
 
 
-void Init_fcgi() {
+void Init_fcgi()
+{
   
   FCGX_Init();
   
@@ -517,7 +528,7 @@
   rb_define_singleton_method(cFCGI, "each", fcgi_s_each, 0);
   rb_define_singleton_method(cFCGI, "each_request", fcgi_s_each, 0);
   rb_define_singleton_method(cFCGI, "is_cgi?", fcgi_s_iscgi, 0);
-  rb_define_method(cFCGI, "in",  fcgi_in, 0);
+  rb_define_method(cFCGI, "in",  fcgi_in,  0);
   rb_define_method(cFCGI, "out", fcgi_out, 0);
   rb_define_method(cFCGI, "err", fcgi_err, 0);
   rb_define_method(cFCGI, "env", fcgi_env, 0);