Refactor: Update integer type usage

This updates the usage of integer types in code I wrote according to our new style guides.

Major changes:
* Use signed instead of unsigned integers in many places.
* C++ containers in blenlib use `int64_t` for size and indices now (instead of `uint`).
* Hash values for C++ containers are 64 bit wide now (instead of 32 bit).

I do hope that I broke no builds, but it is quite likely that some compiler reports
slightly different errors. Please let me know when there are any errors. If the fix
is small, feel free to commit it yourself.
I compiled successfully on linux with gcc and on windows.

1 files changed, 3 insertions, 3 deletions

diff --git a/source/blender/nodes/NOD_node_tree_multi_function.hh b/source/blender/nodes/NOD_node_tree_multi_function.hh
index f7a1fbb114d..79c2b3c7ce8 100644
--- a/source/blender/nodes/NOD_node_tree_multi_function.hh
+++ b/source/blender/nodes/NOD_node_tree_multi_function.hh
@@ -106,7 +106,7 @@ class MFNetworkTreeMap {
   void add(Span<const DInputSocket *> dsockets, Span<fn::MFInputSocket *> sockets)
   {
     assert_same_size(dsockets, sockets);
-    for (uint i : dsockets.index_range()) {
+    for (int i : dsockets.index_range()) {
       this->add(*dsockets[i], *sockets[i]);
     }
   }
@@ -114,7 +114,7 @@ class MFNetworkTreeMap {
   void add(Span<const DOutputSocket *> dsockets, Span<fn::MFOutputSocket *> sockets)
   {
     assert_same_size(dsockets, sockets);
-    for (uint i : dsockets.index_range()) {
+    for (int i : dsockets.index_range()) {
       this->add(*dsockets[i], *sockets[i]);
     }
   }
@@ -133,7 +133,7 @@ class MFNetworkTreeMap {
 
   void add_try_match(Span<const DSocket *> dsockets, Span<fn::MFSocket *> sockets)
   {
-    uint used_sockets = 0;
+    int used_sockets = 0;
     for (const DSocket *dsocket : dsockets) {
       if (!dsocket->is_available()) {
         continue;