patch 8.0.1674: libvterm can't handle an OSC string split

Problem:    Libvterm can't handle a long OSC string that is split.
Solution:   When an incomplete OSC string is received copy it to the parser
            buffer. Increase the size of the parser buffer to be able to
            handle longer strings.

src/libvterm/src/parser.c

@@ -288,6 +288,11 @@ size_t vterm_input_write(VTerm *vt, const char *bytes, size_t len)
         done_string(vt, string_start, bytes + pos - string_start);
         ENTER_NORMAL_STATE();
       }
+      else if (pos + 1 == len) {
+	/* end of input but OSC string isn't finished yet, copy it to
+	 * vt->parser.strbuffer to continue it later */
+        more_string(vt, string_start, bytes + pos + 1 - string_start);
+      }
       break;
 
     case NORMAL:

src/libvterm/src/vterm.c

@@ -52,7 +52,7 @@ VTerm *vterm_new_with_allocator(int rows, int cols, VTermAllocatorFunctions *fun
   vt->parser.callbacks = NULL;
   vt->parser.cbdata    = NULL;
 
-  vt->parser.strbuffer_len = 64;
+  vt->parser.strbuffer_len = 500; /* should be able to hold an OSC string */
   vt->parser.strbuffer_cur = 0;
   vt->parser.strbuffer = vterm_allocator_malloc(vt, vt->parser.strbuffer_len);
 

src/version.c

@@ -762,6 +762,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1674,
 /**/
     1673,
 /**/