Fix some minor KEYCONV and VOC memory issues

Author: Talon1024

src/common/audio/sound/s_sound.cpp

@@ -749,9 +749,8 @@ sfxinfo_t *SoundEngine::LoadSound(sfxinfo_t *sfx)
 		{
 			auto sfxp = sfxdata.data();
 			int32_t dmxlen = LittleLong(((int32_t *)sfxp)[1]);
-
 			// If the sound is voc, use the custom loader.
-			if (memcmp (sfxp, "Creative Voice File", 19) == 0)
+			if (size > 19 && memcmp (sfxp, "Creative Voice File", 19) == 0)
 			{
 				sfx->data = GSnd->LoadSoundVoc(sfxp, size);
 			}

src/gamedata/keysections.cpp

@@ -171,22 +171,22 @@ void D_LoadWadSettings ()
 
 		while (conf < eof)
 		{
-			size_t i;
+			size_t i = 0;
 
 			// Fetch a line to execute
 			command.Clear();
 			for (i = 0; conf + i < eof && conf[i] != '\n'; ++i)
 			{
 				command.Push(conf[i]);
 			}
-			if (i == 0)
+			if (i == 0) // Blank line
 			{
 				conf++;
 				continue;
 			}
 			command.Push(0);
 			conf += i;
-			if (*conf == '\n')
+			if (conf >= eof || *conf == '\n')
 			{
 				conf++;
 			}