crnlib: fix CodeQL report cpp/comparison-with-wider-type

Author: illwieckz

crnlib/crn_comp.cpp

@@ -639,7 +639,7 @@ static void remap_color_endpoints(uint16* remapping, const optimize_color_params
     remaining[i].e = unpacked_endpoints[i];
   }
   crnlib::vector<uint16> chosen(n << 1);
-  uint remaining_count = n, chosen_front = n, chosen_back = chosen_front;
+  uint16 remaining_count = n, chosen_front = n, chosen_back = chosen_front;
   chosen[chosen_front] = selected;
   optimize_color_params::unpacked_endpoint front_e = remaining[selected].e, back_e = front_e;
   bool front_updated = true, back_updated = true;
@@ -665,7 +665,7 @@ static void remap_color_endpoints(uint16* remapping, const optimize_color_params
     }
     frequency = hist + selected * n;
     uint frequency_front = 0, frequency_back = 0;
-    for (int front = chosen_front, back = chosen_back, scale = back - front; scale > 0; front++, back--, scale -= 2) {
+    for (uint16 front = chosen_front, back = chosen_back, scale = back - front; scale > 0; front++, back--, scale -= 2) {
       frequency_front += scale * frequency[chosen[front]];
       frequency_back += scale * frequency[chosen[back]];
     }

crnlib/crn_dxt_hc.cpp

@@ -374,10 +374,10 @@ void dxt_hc::determine_tiles_task(uint64 data, void*) {
           }
         }
 
-        for (uint8 c = m_has_color_blocks ? 0 : cAlpha0; c < cAlpha0 + m_num_alpha_blocks; c++) {
-          for (uint8 e = 0; e < 8; e++) {
+        for (uint c = m_has_color_blocks ? 0 : cAlpha0; c < cAlpha0 + m_num_alpha_blocks; c++) {
+          for (uint e = 0; e < 8; e++) {
             total_error[c][e] = 0;
-            for (uint8 t = 0, s = e + 1; s; s >>= 1, t++)
+            for (uint t = 0, s = e + 1; s; s >>= 1, t++)
               total_error[c][e] += tile_error[c][tiles[e][t]];
           }
         }