On second thought, bring back stdbool.h check back

Might be useful for uClibc (which still doesn't provide it) and others.

CMakeLists.txt

@@ -453,6 +453,7 @@ endif()
 include(LargeFileSupport)
 
 set(NEEDED_HEADERS
+    stdbool.h
     sys/statvfs.h
     xfs/xfs.h
     xlocale.h)

configure.ac

@@ -106,7 +106,7 @@ fi
 AC_HEADER_STDC
 AC_HEADER_TIME
 
-AC_CHECK_HEADERS([xlocale.h])
+AC_CHECK_HEADERS([stdbool.h xlocale.h])
 AC_CHECK_FUNCS([iconv_open pread pwrite lrintf strlcpy daemon dirname basename canonicalize_file_name strcasecmp localtime_r fallocate64 posix_fallocate memmem strsep strtold syslog valloc getpagesize posix_memalign statvfs htonll ntohll mkdtemp uselocale _configthreadlocale])
 AC_PROG_INSTALL
 AC_PROG_MAKE_SET

libtransmission/transmission.h

@@ -29,8 +29,14 @@ extern "C" {
 #include <inttypes.h> /* uintN_t */
 #include <time.h> /* time_t */
 
-#ifndef __cplusplus
- #include <stdbool.h>
+#if !defined (__cplusplus)
+ #ifdef HAVE_STDBOOL_H
+  #include <stdbool.h>
+ #elif !defined (__bool_true_false_are_defined)
+  #define bool uint8_t
+  #define true 1
+  #define false 0
+ #endif
 #endif
 
 #define SHA_DIGEST_LENGTH 20