glsl: remove extern "C" around #includes

Reviewed-by: Anuj Phogat <anuj.phogat@gmail.com>
Reviewed-by: Jose Fonseca <jfonseca@vmware.com>

src/glsl/glsl_parser_extras.cpp

@@ -25,13 +25,10 @@
 #include <string.h>
 #include <assert.h>
 
-extern "C" {
 #include "main/core.h" /* for struct gl_context */
 #include "main/context.h"
 #include "main/shaderobj.h"
 #include "util/u_atomic.h" /* for p_atomic_cmpxchg */
-}
-
 #include "util/ralloc.h"
 #include "ast.h"
 #include "glsl_parser_extras.h"

src/glsl/glsl_types.cpp

@@ -25,9 +25,8 @@
 #include "main/core.h" /* for Elements, MAX2 */
 #include "glsl_parser_extras.h"
 #include "glsl_types.h"
-extern "C" {
 #include "program/hash_table.h"
-}
+
 
 mtx_t glsl_type::mutex = _MTX_INITIALIZER_NP;
 hash_table *glsl_type::array_types = NULL;

src/glsl/linker.cpp

@@ -76,10 +76,9 @@
 #include "ir_rvalue_visitor.h"
 #include "ir_uniform.h"
 
-extern "C" {
 #include "main/shaderobj.h"
 #include "main/enums.h"
-}
+
 
 void linker_error(gl_shader_program *, const char *, ...);