File z88-12.0-crashes.patch of Package z88

--- laserj88.c
+++ laserj88.c
@@ -54,6 +54,13 @@
 
 printf("LaserJet- Commands to Z88O6.TXT ...");
 
+f6= fopen("z88o6.txt","rb");
+if (!f6) {
+  perror("z88o6.txt");
+  return(1);
+}
+rewind(f6);
+
 ftmp= fopen("z88o6.tmp","wb");
 rewind(ftmp);
  
@@ -64,9 +71,6 @@
 /* HP-GL Mode */
 fputs("\x01B\x025\x030\x042\x00D\x00A",ftmp); 
 
-f6= fopen("z88o6.txt","rb"); 
-rewind(f6);
-
 while( (c= fgetc(f6)) != EOF)   
   fputc(c,ftmp);
   
--- pxon88.c
+++ pxon88.c
@@ -48,14 +48,18 @@
 
 printf("Xon/Xoff- Command to Z88O6.TXT ...");
 
+f6= fopen("z88o6.txt","rb");
+if (!f6) {
+  perror("z88o6.txt");
+  return(1);
+}
+rewind(f6);
+
 ftmp= fopen("z88o6.tmp","wb");
 rewind(ftmp);
  
 fputs("\x01B.I256;;17:;\x01B.N;19:;\x00D\x00A",ftmp);
 
-f6= fopen("z88o6.txt","rb"); 
-rewind(f6);
-
 while( (c= fgetc(f6)) != EOF)   
   fputc(c,ftmp);