Minor bit of sanity-checking debug info in dynamic X11 code.

--HG--
extra : convert_revision : svn%3Ac70aab31-4412-0410-b14c-859654838e24/trunk%401879

src/video/x11/SDL_x11dyn.c

@@ -171,6 +171,9 @@ int SDL_X11_LoadSymbols(void)
 		}
 	}
 	#else
+		#if DEBUG_DYNAMIC_X11
+		printf("X11: No dynamic X11 support in this build of SDL.\n");
+		#endif
 		#ifdef X_HAVE_UTF8_STRING
 		pXCreateIC = XCreateIC;
 		#endif