vectors are cleared with "clear()", not with "empty()

src/common/string_conversion.cc

Index: src/common/string_conversion.cc
===================================================================
--- src/common/string_conversion.cc	(revision 948)
+++ src/common/string_conversion.cc	(working copy)
@@ -42,7 +42,7 @@
   const UTF8 *source_ptr = reinterpret_cast<const UTF8 *>(in);
   const UTF8 *source_end_ptr = source_ptr + source_length;
   // Erase the contents and zero fill to the expected size
-  out->empty();
+  out->clear();
   out->insert(out->begin(), source_length, 0);
   u_int16_t *target_ptr = &(*out)[0];
   u_int16_t *target_end_ptr = target_ptr + out->capacity() * sizeof(u_int16_t);
@@ -86,7 +86,7 @@
   const UTF32 *source_ptr = reinterpret_cast<const UTF32 *>(in);
   const UTF32 *source_end_ptr = source_ptr + source_length;
   // Erase the contents and zero fill to the expected size
-  out->empty();
+  out->clear();
   out->insert(out->begin(), source_length, 0);
   u_int16_t *target_ptr = &(*out)[0];
   u_int16_t *target_end_ptr = target_ptr + out->capacity() * sizeof(u_int16_t);