File libgroove-4.3.0-no_overflow.patch of Package libgroove

From: Olaf Hering <olaf@aepfle.de>
Date: 2017-06-19 20:50:00 +0200
Subject: Prevent array from overflowing

gcc warns about prepend[] potentially overflowing,
this patch makes sure it doesn't.

--- a/groove/file.c
+++ b/groove/file.c
@@ -181,18 +181,19 @@ const char *groove_tag_value(struct Groo
 
 static int tempfileify(char * str, size_t max_len) {
     size_t len = strlen(str);
-    if (len + 10 > max_len)
+    size_t ilen = 10;
+    if (len + ilen > max_len)
         return -1;
-    char prepend[11];
-    int n = rand() % 99999;
-    snprintf(prepend, 11, ".tmp%05d-", n);
+    char prepend[ilen + 1];
+    unsigned n = rand() % 99999U;
+    snprintf(prepend, sizeof(prepend), ".tmp%05u-", n);
     // find the last slash and insert after it
     // if no slash, insert at beginning
     char * slash = strrchr(str, '/');
     char * pos = slash ? slash + 1 : str;
     size_t orig_len = len - (pos - str);
-    memmove(pos + 10, pos, orig_len);
-    strncpy(pos, prepend, 10);
+    memmove(pos + ilen, pos, orig_len);
+    strncpy(pos, prepend, ilen);
     return 0;
 }