Fix string warning I introduced with indirect function support.

llvm-svn: 176360
diff --git a/lldb/source/Plugins/Process/POSIX/ProcessPOSIX.cpp b/lldb/source/Plugins/Process/POSIX/ProcessPOSIX.cpp
index 0a741bc..417b941 100644
--- a/lldb/source/Plugins/Process/POSIX/ProcessPOSIX.cpp
+++ b/lldb/source/Plugins/Process/POSIX/ProcessPOSIX.cpp
@@ -491,7 +491,8 @@
         error.SetErrorStringWithFormat("unable to determine direct function call for NULL address");
     } else if (!InferiorCall(this, address, function_addr)) {
         function_addr = LLDB_INVALID_ADDRESS;
-        error.SetErrorStringWithFormat("unable to determine direct function call for indirect function with address %x", address);
+        error.SetErrorStringWithFormat("unable to determine direct function call for indirect function %s",
+                                       address->CalculateSymbolContextSymbol()->GetName().AsCString());
     }
     return function_addr;
 }