Disable wxUSE_ACTIVITYINDICATOR for non-MSVC compilers under MSW.

Don't give errors in the default configuration for MinGW makefile builds in
which wxUSE_GRAPHICS_CONTEXT is disabled, but wxUSE_ACTIVITYINDICATOR is
enabled.

Instead, disable wxUSE_ACTIVITYINDICATOR implicitly for them, this is not
ideal but better than broken build.

include/wx/chkconf.h

@@ -2247,15 +2247,6 @@
 #   endif
 #endif /* wxUSE_PREFERENCES_EDITOR */
 
-#if wxUSE_ACTIVITYINDICATOR && !wxUSE_GRAPHICS_CONTEXT
-#   ifdef wxABORT_ON_CONFIG_ERROR
-#       error "wxUSE_ACTIVITYINDICATOR requires wxGraphicsContext"
-#   else
-#       undef wxUSE_ACTIVITYINDICATOR
-#       define wxUSE_ACTIVITYINDICATOR 0
-#   endif
-#endif /* wxUSE_ACTIVITYINDICATOR */
-
 #endif /* wxUSE_GUI */
 
 #endif /* _WX_CHKCONF_H_ */

include/wx/msw/chkconf.h

@@ -223,6 +223,16 @@
 #   endif /* wxUSE_ACTIVEX */
 #endif /* __WINE__ */
 
+/*
+    Currently wxUSE_GRAPHICS_CONTEXT is only enabled with MSVC by default, so
+    only check for wxUSE_ACTIVITYINDICATOR dependency on it if it can be
+    enabled, otherwise turn the latter off to allow the library to compile.
+ */
+#if !wxUSE_GRAPHICS_CONTEXT && !defined(_MSC_VER)
+#   undef wxUSE_ACTIVITYINDICATOR
+#   define wxUSE_ACTIVITYINDICATOR 0
+#endif /* !wxUSE_ACTIVITYINDICATOR && !_MSC_VER */
+
 
 /* check settings consistency for MSW-specific ones */
 #if wxUSE_CRASHREPORT && !wxUSE_ON_FATAL_EXCEPTION
@@ -356,6 +366,15 @@
 #   endif
 #endif /* !wxUSE_ACTIVEX */
 
+#if wxUSE_ACTIVITYINDICATOR && !wxUSE_GRAPHICS_CONTEXT
+#   ifdef wxABORT_ON_CONFIG_ERROR
+#       error "wxUSE_ACTIVITYINDICATOR requires wxGraphicsContext"
+#   else
+#       undef wxUSE_ACTIVITYINDICATOR
+#       define wxUSE_ACTIVITYINDICATOR 0
+#   endif
+#endif /* wxUSE_ACTIVITYINDICATOR */
+
 #if !wxUSE_THREADS
 #   if wxUSE_FSWATCHER
 #       ifdef wxABORT_ON_CONFIG_ERROR