Merge branch 'eggshield-laser-fix' into 'next'

Eggshield laser fix

Fix for http://mb.srb2.org/showthread.php?t=42250

See merge request !152

src/p_spec.c

@@ -5342,6 +5342,10 @@ void T_LaserFlash(laserthink_t *flash)
 			&& thing->flags & MF_BOSS)
 			continue; // Don't hurt bosses
 
+		// Don't endlessly kill egg guard shields (or anything else for that matter)
+		if (thing->health <= 0)
+			continue;
+
 		top = P_GetSpecialTopZ(thing, sourcesec, sector);
 		bottom = P_GetSpecialBottomZ(thing, sourcesec, sector);