[clang-format][NFC] Use member directly

[HazardyKnusperkeks]

Summary

Instead of passing it as argument to the member function.

[curdeius]

LGTM if CI is happy.

clang/lib/Format/UnwrappedLineFormatter.cpp

void nextLine(const AnnotatedLine &Line) {
     while (IndentForLevel.size() <= Line.Level)
       IndentForLevel.push_back(-1);
     if (Line.InPPDirective) {
       unsigned IndentWidth =
           (Style.PPIndentWidth >= 0) ? Style.PPIndentWidth : Style.IndentWidth;
       Indent = Line.Level * IndentWidth + AdditionalIndent;
     } else {
       IndentForLevel.resize(Line.Level + 1);
-      Indent = getIndent(IndentForLevel, Line.Level);
+      Indent = getIndent(Line.Level);
     }
     if (static_cast<int>(Indent) + Offset >= 0)
       Indent += Offset;
     if (Line.First->is(TT_CSharpGenericTypeConstraint))
       Indent = Line.Level * Style.IndentWidth + Style.ContinuationIndentWidth;
   }
 
   /// Update the indent state given that \p Line indent should be
int getIndentOffset(const FormatToken &RootToken) {
     return 0;
   }
 
   /// Get the indent of \p Level from \p IndentForLevel.
   ///
   /// \p IndentForLevel must contain the indent for the level \c l
   /// at \p IndentForLevel[l], or a value < 0 if the indent for
   /// that level is unknown.
-  unsigned getIndent(ArrayRef<int> IndentForLevel, unsigned Level) {
+  unsigned getIndent(unsigned Level) const {
     if (IndentForLevel[Level] != -1)
       return IndentForLevel[Level];
     if (Level == 0)
       return 0;
-    return getIndent(IndentForLevel, Level - 1) + Style.IndentWidth;
+    return getIndent(Level - 1) + Style.IndentWidth;
   }
 
   const FormatStyle &Style;
   const AdditionalKeywords &Keywords;
   const unsigned AdditionalIndent;
 
   /// The indent in characters for each level.
   std::vector<int> IndentForLevel;