Replace NULL with nullptr

Also fixed some lines that were too long, and a few other minor
details.

Change-Id: I6efba5fb6e03eb5d0a300fddb2a75bf8e2f175cb
diff --git a/compiler/dex/quick/x86/call_x86.cc b/compiler/dex/quick/x86/call_x86.cc
index d7a5eb0..e2364d8 100644
--- a/compiler/dex/quick/x86/call_x86.cc
+++ b/compiler/dex/quick/x86/call_x86.cc
@@ -80,7 +80,7 @@
 
   // Bounds check - if < 0 or >= size continue following switch
   OpRegImm(kOpCmp, keyReg, size - 1);
-  LIR* branch_over = OpCondBranch(kCondHi, NULL);
+  LIR* branch_over = OpCondBranch(kCondHi, nullptr);
 
   RegStorage addr_for_jump;
   if (cu_->target64) {