src: use default initializers over settings fields on the constructor

PR-URL: #23532
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Gireesh Punathil <gpunathi@in.ibm.com>
Reviewed-By: Sakthipriyan Vairamani <thechargingvolcano@gmail.com>
Reviewed-By: Trivikram Kamat <trivikr.dev@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>

src/spawn_sync.cc

@@ -50,9 +50,7 @@ using v8::String;
 using v8::Value;
 
 
-SyncProcessOutputBuffer::SyncProcessOutputBuffer()
-    : used_(0),
-      next_(nullptr) {
+SyncProcessOutputBuffer::SyncProcessOutputBuffer() {
 }
 
 

src/spawn_sync.h

@@ -56,9 +56,9 @@ class SyncProcessOutputBuffer {
  private:
   // Use unsigned int because that's what `uv_buf_init` takes.
   mutable char data_[kBufferSize];
-  unsigned int used_;
+  unsigned int used_ = 0;
 
-  SyncProcessOutputBuffer* next_;
+  SyncProcessOutputBuffer* next_ = nullptr;
 };