Fix building with both LTO and VPX support enabled. Specifically, don't use

the 'optimize' function attribute if LTO is enabled.

git-svn-id: https://svn.eduke32.com/eduke32@2107 1a8010ca-5511-0410-912e-c29ae57300e0

polymer/eduke32/Makefile.common

@@ -84,7 +84,7 @@ ifneq (0,$(RELEASE))
     endif
     ifneq (0,$(LTO))
         LIBS+= -flto
-        debug+= -flto
+        debug+= -DUSING_LTO -flto
     endif
 else
     # Debugging enabled

polymer/eduke32/source/animvpx.c

@@ -208,10 +208,12 @@ const char *animvpx_nextpic_errmsg[] = {
 // retrieves one picture-frame from the stream
 //  pic format:  lines of [Y U V 0] pixels
 //  *picptr==NULL means EOF has been reached
-#ifdef DEBUGGINGAIDS
+#ifndef USING_LTO
+# ifdef DEBUGGINGAIDS
 ATTRIBUTE((optimize("O1")))
-#else
+# else
 ATTRIBUTE((optimize("O3")))
+# endif
 #endif
 int32_t animvpx_nextpic(animvpx_codec_ctx *codec, uint8_t **picptr)
 {