DebugInfo: Remove unnecessary zero-size check

This seems excessive - switching section isn't expensive (or if it is
we're already being wasteful, since we emitted the debug_loc section
symbol earlier anyway) and otherwise there's no work that happens in
this function when the list is empty.

llvm-svn: 204696

llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp

@@ -2377,9 +2377,6 @@ void DwarfDebug::emitDebugLocEntry(ByteStreamer &Streamer,
 
 // Emit locations into the debug loc section.
 void DwarfDebug::emitDebugLoc() {
-  if (DotDebugLocEntries.empty())
-    return;
-
   // Start the dwarf loc section.
   Asm->OutStreamer.SwitchSection(
       Asm->getObjFileLowering().getDwarfLocSection());