File fix-missing-gl.patch of Package gambas

--- a/gb.sdl/configure.ac
+++ b/gb.sdl/configure.ac
@@ -33,7 +33,7 @@
 
 GB_COMPONENT_SEARCH(
    sdl, SDL, gb.sdl, [src],
-   'sdl > 1.2.8' SDL_ttf glew xcursor x11,
+   'sdl > 1.2.8' SDL_ttf gl glew xcursor x11,
    [GB_FIND(GL/glew.h SDL_ttf.h X11/Xcursor/Xcursor.h, /usr /usr/local `sdl-config --prefix`, include include/SDL)],
    [GB_FIND(libSDL_ttf.$SHLIBEXT libGLEW.$SHLIBEXT libXcursor.$SHLIBEXT, /usr /usr/local `sdl-config --prefix`, lib)],
    [$X_LIBS -lSDL_ttf -lGLEW -lXcursor],