patch 8.2.3328: Coverity error for not checking return value

Problem:    Coverity error for not checking return value.
Solution:   Check value is not negative.

src/spellfile.c

@@ -1258,6 +1258,8 @@ read_compound(FILE *fd, slang_T *slang, int len)
 
 	gap = &slang->sl_comppat;
 	c = get2c(fd);					// <comppatcount>
+	if (c < 0)
+	    return SP_TRUNCERROR;
 	todo -= 2;
 	ga_init2(gap, sizeof(char_u *), c);
 	if (ga_grow(gap, c) == OK)

src/version.c

@@ -755,6 +755,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    3328,
 /**/
     3327,
 /**/