wrap config.h include under LAGI and put -DLAGI when compiling to ensure it's only included when building libaegisub.

Originally committed to SVN as r4585.

aegisub/libaegisub/Makefile.am

@@ -4,7 +4,7 @@ AM_CXXFLAGS=
 DISTCLEANFILES=
 
 lib_LTLIBRARIES = libaegisub-2.2.la
-libaegisub_2_2_la_CPPFLAGS = -I../src/include -Iinclude -I. @WX_CPPFLAGS@ -pedantic
+libaegisub_2_2_la_CPPFLAGS = -I../src/include -Iinclude -I. @WX_CPPFLAGS@ -pedantic -DLAGI
 libaegisub_2_2_la_LDFLAGS = @ICONV_LDFLAGS@
 
 if PRECOMPILED_HEADER

aegisub/libaegisub/include/libaegisub/types.h

@@ -18,10 +18,11 @@
 /// @brief Platform specific types.
 /// @ingroup libaegisub
 
-#ifndef LAGI_PRE
-
+#ifdef LAGI
 #include "config.h"
+#endif
 
+#ifndef LAGI_PRE
 #ifdef HAVE_SYS_TIME_H
 #  include <sys/time.h>
 #else