Cleanup: Clang-tidy warnings.

Silence Clang-tidy warnings in gpu module.

source/blender/gpu/intern/gpu_shader_builder_stubs.cc

@@ -39,6 +39,8 @@
 
 #include "DNA_userdef_types.h"
 
+#include "NOD_shader.h"
+
 #include "DRW_engine.h"
 
 #include "bmesh.h"
@@ -167,7 +169,7 @@ void BKE_mesh_looptri_get_real_edges(const struct Mesh *UNUSED(mesh),
 /** \name Stubs of BKE_material.h
  * \{ */
 
-void BKE_material_defaults_free_gpu(void)
+void BKE_material_defaults_free_gpu()
 {
   /* This function is reachable via GPU_exit. */
 }

source/blender/gpu/intern/gpu_shader_dependency.cc

@@ -119,7 +119,7 @@ struct GPUSource {
   template<bool check_whole_word = true, bool reversed = false, typename T>
   int64_t find_str(const StringRef &input, const T keyword, int64_t offset = 0)
   {
-    while (1) {
+    while (true) {
       if constexpr (reversed) {
         offset = input.rfind(keyword, offset);
       }
@@ -202,10 +202,10 @@ struct GPUSource {
    * - All values needs to be specified using constant literals to avoid compiler differences.
    * - All values needs to have the 'u' suffix to avoid GLSL compiler errors.
    */
-  void enum_preprocess(void)
+  void enum_preprocess()
   {
     const StringRefNull input = source;
-    std::string output = "";
+    std::string output;
     int64_t cursor = 0;
     int64_t last_pos = 0;
     const bool is_cpp = filename.endswith(".hh");
@@ -220,7 +220,7 @@ struct GPUSource {
     continue; \
   }
 
-    while (1) {
+    while (true) {
       cursor = find_keyword(input, "enum ", cursor);
       if (cursor == -1) {
         break;