Drop GLcontext typedef and use struct gl_context instead
diff --git a/src/glsl/linker.cpp b/src/glsl/linker.cpp
index c612fe5..2cbfd78 100644
--- a/src/glsl/linker.cpp
+++ b/src/glsl/linker.cpp
@@ -719,7 +719,7 @@
  * shader is returned.
  */
 static struct gl_shader *
-link_intrastage_shaders(GLcontext *ctx,
+link_intrastage_shaders(struct gl_context *ctx,
 			struct gl_shader_program *prog,
 			struct gl_shader **shader_list,
 			unsigned num_shaders)
@@ -1386,7 +1386,7 @@
 
 
 void
-link_shaders(GLcontext *ctx, struct gl_shader_program *prog)
+link_shaders(struct gl_context *ctx, struct gl_shader_program *prog)
 {
    prog->LinkStatus = false;
    prog->Validated = false;