Revert of Change FX_BOOL definition from int to bool.

core/fxcrt/fx_system.h

Index: core/fxcrt/fx_system.h
diff --git a/core/fxcrt/fx_system.h b/core/fxcrt/fx_system.h
index bcddf1aeeba1906fda651a6d55fa500fbaa8d80e..8364db3a4eccbfe5a9444a1282cd091c8a5185b0 100644
--- a/core/fxcrt/fx_system.h
+++ b/core/fxcrt/fx_system.h
@@ -65,18 +65,11 @@
 
 #ifdef __cplusplus
 extern "C" {
-typedef bool FX_BOOL;  // Deprecated.
-#ifndef TRUE
-#define TRUE true
-#endif
-#ifndef FALSE
-#define FALSE false
-#endif
-#endif  // __cplusplus
-
+#endif
 typedef void* FX_POSITION;  // Keep until fxcrt containers gone
 typedef float FX_FLOAT;     // Keep, allow upgrade to doubles.
 typedef double FX_DOUBLE;   // Keep, allow downgrade to floats.
+typedef int FX_BOOL;        // Keep, sadly not always 0 or 1.
 typedef char FX_CHAR;       // Keep, questionable signedness.
 typedef wchar_t FX_WCHAR;   // Keep, maybe bad platform wchars.
 
@@ -89,6 +82,14 @@
 // allow -1 as a placeholder for "unknown".
 // TODO(palmer): it should be a |size_t|, or at least unsigned.
 typedef int FX_STRSIZE;
+
+#ifndef TRUE
+#define TRUE 1
+#endif
+
+#ifndef FALSE
+#define FALSE 0
+#endif
 
 #ifdef __cplusplus
 static_assert(TRUE == true, "true_needs_to_be_true");