fbc: fix regression for __FB_GUI__ intrinsic define

- __FB_GUI__ definition was clobbered by basic-macros dc46f69
- add test to tests/pp/intrinsic.bas to check for __FB_GUI__ definition

Author: jayrm

changelog.txt

@@ -149,6 +149,7 @@ Version 1.08.0
 - github #217: C backend, fix gcc array out of bounds warning when compiled with -O2 or higher optimizations and accessing non-zero lower bound fixed length string arrays
 - C backend: inline asm - don't add rsp/esp to the clobber list, it's deprecated in newer gcc versions and silently ignored in older versions 
 - github #309: token pasting operator '##' allows pasting of single '_' characters
+- fbc: re-add __FB_GUI__ intrinsic define - the change was clobbered for a time during fbc 1.08.0 development after basic-macros were added
 
 
 Version 1.07.0

src/compiler/symb-define.bas

@@ -769,7 +769,8 @@ dim shared defTb(0 to ...) as SYMBDEF => _
 	(@"__FB_BACKEND__"        , NULL          , FB_DEFINE_FLAGS_STR, @hDefBackend_cb    ), _
 	(@"__FB_FPU__"            , NULL          , FB_DEFINE_FLAGS_STR, @hDefFpu_cb        ), _
 	(@"__FB_FPMODE__"         , NULL          , FB_DEFINE_FLAGS_STR, @hDefFpmode_cb     ), _
-	(@"__FB_GCC__"            , NULL          , 0                  , @hDefGcc_cb        ) _
+	(@"__FB_GCC__"            , NULL          , 0                  , @hDefGcc_cb        ), _
+	(@"__FB_GUI__"            , NULL          , 0                  , @hDefGui_cb        )  _
 }
 
 type SYMBMACRO

tests/pp/intrinsic.bas

@@ -102,6 +102,10 @@
 #error __TIME__ not defined
 #endif
 
+#ifndef __FB_GUI__
+#error __FB_GUI__ not defined
+#endif
+
 
 '' Always defined for this test