[NFC][sanitizer] Minor change: eliminate loop

[fmayer]

Looks good! Please add "[NFC]" to the commit message to indicate this change is non-functional.

[prehistoric-penguin]

[NFC] Minor change: eliminate loop

compiler-rt/lib/sanitizer_common/sanitizer_vector.h

void Resize(uptr size) {
     }
     uptr old_size = Size();
     if (size <= old_size) {
       end_ = begin_ + size;
       return;
     }
     EnsureSize(size);
     if (old_size < size) {
-      for (uptr i = old_size; i < size; i++)
-        internal_memset(&begin_[i], 0, sizeof(begin_[i]));
+      internal_memset(&begin_[old_size], 0,
+                      sizeof(begin_[old_size]) * (size - old_size));
     }
   }
 
  private:
   T *begin_;
   T *end_;
   T *last_;