build(patches): add GCC 12 compatibility fixes for squid

Add two patches to address compilation warnings and errors with GCC 12:
- fix-alloc-size.patch: Resolves -Werror=alloc-size-larger-than warnings
  by changing signed to unsigned integer types for size comparisons
- fix-sign-compare-disks.patch: Fixes sign comparison warnings in
  SwapDirByIndex by adding proper type casting

Author: tmeckel

patch/6/fix-alloc-size.patch

@@ -0,0 +1,65 @@
+From: Sergio Durigan Junior <sergio.durigan@canonical.com>
+Date: Tue, 9 Aug 2022 17:49:23 -0400
+Subject: Fix -Werror=alloc-size-larger-than on GCC 12
+
+Author: Sergio Durigan Junior <sergiodj@ubuntu.com>
+Forwarded: yes, https://github.com/squid-cache/squid/pull/1118
+---
+ src/SquidConfig.h  | 2 +-
+ src/pconn.cc       | 2 +-
+ src/pconn.h        | 2 +-
+ src/store/Disks.cc | 2 +-
+ 4 files changed, 4 insertions(+), 4 deletions(-)
+
+diff --git a/src/SquidConfig.h b/src/SquidConfig.h
+index feabdf1..6b3cca5 100644
+--- a/src/SquidConfig.h
++++ b/src/SquidConfig.h
+@@ -61,7 +61,7 @@ public:
+     ~DiskConfig() { delete[] swapDirs; }
+
+     RefCount<SwapDir> *swapDirs = nullptr;
+-    int n_allocated = 0;
++    unsigned int n_allocated = 0;
+     int n_configured = 0;
+     /// number of disk processes required to support all cache_dirs
+     int n_strands = 0;
+diff --git a/src/pconn.cc b/src/pconn.cc
+index 62e5411..d30726d 100644
+--- a/src/pconn.cc
++++ b/src/pconn.cc
+@@ -167,7 +167,7 @@ IdleConnList::clearHandlers(const Comm::ConnectionPointer &conn)
+ void
+ IdleConnList::push(const Comm::ConnectionPointer &conn)
+ {
+-    if (size_ == capacity_) {
++    if ((unsigned int) size_ == capacity_) {
+         debugs(48, 3, "growing idle Connection array");
+         capacity_ <<= 1;
+         const Comm::ConnectionPointer *oldList = theList_;
+diff --git a/src/pconn.h b/src/pconn.h
+index 85e44e5..b8f07d9 100644
+--- a/src/pconn.h
++++ b/src/pconn.h
+@@ -80,7 +80,7 @@ private:
+     Comm::ConnectionPointer *theList_;
+
+     /// Number of entries theList can currently hold without re-allocating (capacity).
+-    int capacity_;
++    unsigned int capacity_;
+     ///< Number of in-use entries in theList
+     int size_;
+
+diff --git a/src/store/Disks.cc b/src/store/Disks.cc
+index 4e8710a..f9c3171 100644
+--- a/src/store/Disks.cc
++++ b/src/store/Disks.cc
+@@ -685,7 +685,7 @@ allocate_new_swapdir(Store::DiskConfig *swap)
+         swap.swapDirs = new SwapDir::Pointer[swap.n_allocated];
+     }
+
+-    if (swap.n_allocated == swap.n_configured) {
++    if (swap.n_allocated == (size_t) swap.n_configured) {
+         swap.n_allocated <<= 1;
+         const auto tmp = new SwapDir::Pointer[swap.n_allocated];
+         for (int i = 0; i < swap.n_configured; ++i) {

patch/6/fix-sign-compare-disks.patch

@@ -0,0 +1,13 @@
+diff --git a/src/store/Disks.cc b/src/store/Disks.cc
+index 4e8710a..modified 100644
+--- a/src/store/Disks.cc
++++ b/src/store/Disks.cc
+@@ -58,7 +58,7 @@ SwapDir &SwapDirByIndex(const int i)
+ {
+     assert(i >= 0);
+-    assert(i < Config.cacheSwap.n_allocated);
++    assert(static_cast<unsigned int>(i) < Config.cacheSwap.n_allocated);
+     const auto sd = INDEXSD(i);
+     assert(sd);
+     return *sd;
+ }