[clang-format][NFC] Reorder conditions

[HazardyKnusperkeks]

Summary

Prefer to check the local variables first before dereferencing the pointer.

[curdeius]

LGTM.

clang/lib/Format/TokenAnnotator.cpp

void parse(int Precedence = 0) {
     unsigned OperatorIndex = 0;
 
     while (Current) {
       // Consume operators with higher precedence.
       parse(Precedence + 1);
 
       int CurrentPrecedence = getCurrentPrecedence();
 
-      if (Current && Current->is(TT_SelectorName) &&
-          Precedence == CurrentPrecedence) {
+      if (Precedence == CurrentPrecedence && Current &&
+          Current->is(TT_SelectorName)) {
         if (LatestOperator)
           addFakeParenthesis(Start, prec::Level(Precedence));
         Start = Current;
       }
 
       // At the end of the line or when an operator with higher precedence is
       // found, insert fake parenthesis and return.
       if (!Current ||