Added a stub for Heap32ListFirst.

dlls/kernel/kernel32.spec

@@ -541,7 +541,7 @@
 @ stdcall GlobalUnlock(long)
 @ stdcall GlobalWire(long)
 @ stub Heap32First
-@ stub Heap32ListFirst
+@ stdcall Heap32ListFirst(long ptr)
 @ stub Heap32ListNext
 @ stub Heap32Next
 @ stdcall HeapAlloc(long long long) ntdll.RtlAllocateHeap

dlls/kernel/toolhelp.c

@@ -423,3 +423,13 @@ DWORD WINAPI GlobalMasterHandle16(void)
     FIXME(": stub\n");
     return 0;
 }
+
+/************************************************************************
+ *              Heap32ListFirst (KERNEL.@)
+ *
+ */
+BOOL WINAPI Heap32ListFirst(HANDLE hSnapshot, LPHEAPLIST32 lphl)
+{
+    FIXME(": stub\n");
+    return FALSE;
+}

include/tlhelp32.h

@@ -146,6 +146,15 @@ BOOL WINAPI Module32NextW(HANDLE,LPMODULEENTRY32W);
 #define LPMODULEENTRY32 LPMODULEENTRY32W
 #endif
 
+typedef struct tagHEAPLIST32 {
+    SIZE_T dwSize;
+    DWORD th32ProcessID;
+    ULONG_PTR th32HeapID;
+    DWORD dwFlags;
+} HEAPLIST32, *PHEAPLIST32, *LPHEAPLIST32;
+
+BOOL WINAPI Heap32ListFirst(HANDLE,LPHEAPLIST32);
+
 #ifdef __cplusplus
 } /* extern "C" */
 #endif