#237183

r=mkaply, sr=blizzard (platform specific), a=mkaply
OS/2 only - add support for exception handler to NSPR so we can catch floating point exceptions

xpcom/threads/plevent.c

@@ -21,6 +21,8 @@
 #endif
 
 #if defined(XP_OS2)
+#define INCL_DOS
+#define INCL_DOSERRORS
 #define INCL_WIN
 #include <os2.h>
 #define DefWindowProc WinDefWindowProc