[PATCH] kernelbase: Only subtract 2 when strings arent equal.

[Alistair Leslie-Hughes]

Restores code remove from commit 2a455ce049d65eeab95895b6b6d52f6e5047537b.

Always subtracting 2 means two strings could never be equal, returning 0.

Signed-off-by: Alistair Leslie-Hughes 
---
 dlls/kernelbase/string.c | 24 ++++++++++++++++++++----
 1 file changed, 20 insertions(+), 4 deletions(-)

diff --git a/dlls/kernelbase/string.c b/dlls/kernelbase/string.c
index 7bea47942e..edc68ed01e 100644
--- a/dlls/kernelbase/string.c
+++ b/dlls/kernelbase/string.c
@@ -67,34 +67,50 @@ static BOOL char_compare(WORD ch1, WORD ch2, DWORD flags)

int WINAPI lstrcmpA( LPCSTR str1, LPCSTR str2 )
 {
+    int ret;
     if (!str1 && !str2) return 0;
     if (!str1) return -1;
     if (!str2) return 1;
-    return CompareStringA( GetThreadLocale(), LOCALE_USE_CP_ACP, str1, -1, str2, -1 ) - 2;
+    ret = CompareStringA( GetThreadLocale(), LOCALE_USE_CP_ACP, str1, -1, str2, -1 );
+    if (ret) ret -= 2;
+
+    return ret;
 }

int WINAPI lstrcmpW(LPCWSTR str1, LPCWSTR str2)
 {
+    int ret;
     if (!str1 && !str2) return 0;
     if (!str1) return -1;
     if (!str2) return 1;
-    return CompareStringW( GetThreadLocale(), 0, str1, -1, str2, -1 ) - 2;
+    ret = CompareStringW( GetThreadLocale(), 0, str1, -1, str2, -1 );
+    if (ret) ret -= 2;
+
+    return ret;
 }

int WINAPI lstrcmpiA(LPCSTR str1, LPCSTR str2)
 {
+    int ret;
     if (!str1 && !str2) return 0;
     if (!str1) return -1;
     if (!str2) return 1;
-    return CompareStringA( GetThreadLocale(), NORM_IGNORECASE|LOCALE_USE_CP_ACP, str1, -1, str2, -1 ) - 2;
+    ret = CompareStringA( GetThreadLocale(), NORM_IGNORECASE|LOCALE_USE_CP_ACP, str1, -1, str2, -1 );
+    if (ret) ret -= 2;
+
+    return ret;
 }

int WINAPI lstrcmpiW(LPCWSTR str1, LPCWSTR str2)
 {
+    int ret;
     if (!str1 && !str2) return 0;
     if (!str1) return -1;
     if (!str2) return 1;
-    return CompareStringW( GetThreadLocale(), NORM_IGNORECASE, str1, -1, str2, -1 ) - 2;
+    ret = CompareStringW( GetThreadLocale(), NORM_IGNORECASE, str1, -1, str2, -1 );
+    if (ret) ret -= 2;
+
+    return ret;
 }

LPSTR WINAPI KERNELBASE_lstrcpynA( LPSTR dst, LPCSTR src, INT n )