Cleanup: partial Clang-Tidy modernize-loop-convert

Modernize loops by using the `for(type variable : container)` syntax.

Some loops were trivial to fix, whereas others required more attention
to avoid semantic changes. I couldn't address all old-style loops, so
this commit doesn't enable the `modernize-loop-convert` rule.

Although Clang-Tidy's auto-fixer prefers to use `auto` for the loop
variable declaration, I made as many declarations as possible explicit.
To me this increases local readability, as you don't need to fully
understand the container in order to understand the loop variable type.

No functional changes.

1 files changed, 1 insertions, 2 deletions

diff --git a/source/blender/depsgraph/intern/builder/deg_builder_nodes.cc b/source/blender/depsgraph/intern/builder/deg_builder_nodes.cc
index d71cdea1974..5af70305e13 100644
--- a/source/blender/depsgraph/intern/builder/deg_builder_nodes.cc
+++ b/source/blender/depsgraph/intern/builder/deg_builder_nodes.cc
@@ -1247,8 +1247,7 @@ void DepsgraphNodeBuilder::build_particle_settings(ParticleSettings *particle_se
       &particle_settings->id, NodeType::PARTICLE_SETTINGS, OperationCode::PARTICLE_SETTINGS_EVAL);
   op_node->set_as_exit();
   /* Texture slots. */
-  for (int mtex_index = 0; mtex_index < MAX_MTEX; mtex_index++) {
-    MTex *mtex = particle_settings->mtex[mtex_index];
+  for (MTex *mtex : particle_settings->mtex) {
     if (mtex == nullptr || mtex->tex == nullptr) {
       continue;
     }