winmm: Avoid casting return value of Heap(Re)Alloc calls.

[Dan Kegel]

2011/10/23 Jerome Leclanche <adys.wh at gmail.com>:
>> How would people feel if configure turned on -Werror
>> when it's safe to if building from git?  Something like this...
>
> It's still unsafe, you're limited to a subset of gcc versions.

That's not too hard to check for:

--- a/configure.ac
+++ b/configure.ac
@@ -1715,6 +1715,19 @@ then
   if test "x$enable_maintainer_mode" = "xyes"
   then
       WINE_TRY_CFLAGS([-Werror])
+  else
+    dnl Enable -Werror when building from git on 32 bit x86 with a
known good version of gcc
+    case $host_cpu in
+      *i[[3456789]]86*)
+        if test "x${GCC}" = "xyes" && test -d $srcdir/.git
+        then
+          case `$(CC) -v 2>&1 | grep "gcc version" | sed 's/gcc
version //' ` in
+          4.[3456].*)
+            WINE_TRY_CFLAGS([-Werror]) ;;
+          esac
+        fi
+      ;;
+    esac
   fi

   dnl Check for ms_hook_prologue support

> Not worth it.

In which sense?   Is it too hard to make it safe?

If it safely cuts down on the number of times people
have to resubmit patches, why not do it?
- Dan