remove some redundant exit() calls

code/qcommon/vm_powerpc.c

@@ -45,11 +45,7 @@ static clock_t time_total_vm = 0;
 #endif
 
 /* exit() won't be called but use it because it is marked with noreturn */
-#define DIE( reason ) \
-	do { \
-		Com_Error(ERR_DROP, "vm_powerpc compiler error: " reason); \
-		exit(1); \
-	} while(0)
+#define DIE( reason ) Com_Error( ERR_DROP, "vm_powerpc compiler error: " reason )
 
 /*
  * vm_powerpc uses large quantities of memory during compilation,

code/qcommon/vm_x86.c

@@ -384,7 +384,6 @@ Error handler for jump/call to invalid instruction number
 static void __attribute__((__noreturn__)) ErrJump(void)
 { 
 	Com_Error(ERR_DROP, "program tried to execute code outside VM");
-	exit(1);
 }
 
 /*