patch 8.2.3170: Illegal memory access in test

Problem:    Illegal memory access in test.
Solution:   Check pointer is not before the start of the line.

Author: brammool

src/userfunc.c

@@ -870,7 +870,7 @@ get_function_body(
 	    end = p + STRLEN(p) - 1;
 	    while (end > p && VIM_ISWHITE(*end))
 		--end;
-	    if (*end == '{')
+	    if (end > p && *end == '{')
 	    {
 		--end;
 		while (end > p && VIM_ISWHITE(*end))

src/version.c

@@ -755,6 +755,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    3170,
 /**/
     3169,
 /**/