[reactos] 04/09: [SYSDM] Fix uninitialized variables warnings detected by Clang. (#3619) CORE-17545

[Hermès Bélusca-Maïto]

https://git.reactos.org/?p=reactos.git;a=commitdiff;h=ab8d7f254802f20aab4e1…

commit ab8d7f254802f20aab4e1f85e5370b032e109e06
Author:     Hermès Bélusca-Maïto <hermes.belusca-maito(a)reactos.org>
AuthorDate: Wed Apr 21 18:29:11 2021 +0200
Commit:     Hermès Bélusca-Maïto <hermes.belusca-maito(a)reactos.org>
CommitDate: Wed May 5 17:24:11 2021 +0200

    [SYSDM] Fix uninitialized variables warnings detected by Clang. (#3619)
    CORE-17545
    
    Addendum to commit d635ce0c.
    
    dll/cpl/sysdm/general.c:156:25: warning: variable 'hCreditsDC' is used
uninitialized whenever 'if' condition is true [-Wsometimes-uninitialized]
                        if (hDC == NULL)
                            ^~~~~~~~~~~
    dll/cpl/sysdm/general.c:216:25: note: uninitialized use occurs here
                        if (hCreditsDC != NULL) DeleteDC(hCreditsDC);
                            ^~~~~~~~~~
    
    and the same for hLogoDC:
    
    dll/cpl/sysdm/general.c:215:25: note: uninitialized use occurs here
                        if (hLogoDC != NULL) DeleteDC(hLogoDC);
                            ^~~~~~~
---
 dll/cpl/sysdm/general.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/dll/cpl/sysdm/general.c b/dll/cpl/sysdm/general.c
index 746c8235b16..c23010e6e3f 100644
--- a/dll/cpl/sysdm/general.c
+++ b/dll/cpl/sysdm/general.c
@@ -148,19 +148,21 @@ LRESULT CALLBACK RosImageProc(HWND hwnd, UINT uMsg, WPARAM wParam,
LPARAM lParam
             {
                 if (timerid == 0)
                 {
-                    HDC hCreditsDC, hLogoDC;
-                    HDC hDC = GetDC(NULL);
+                    HDC hDC;
+                    HDC hCreditsDC = NULL, hLogoDC = NULL;
                     HFONT hFont = NULL;
                     NONCLIENTMETRICS ncm;
                     RECT rcCredits;
                     TCHAR szCredits[2048];
                     INT iDevsHeight;
 
+                    hDC = GetDC(NULL);
                     if (hDC == NULL)
                         goto Cleanup;
 
                     top = 0;
                     offset = 0;
+
                     hCreditsDC = CreateCompatibleDC(hDC);
                     hLogoDC = CreateCompatibleDC(hCreditsDC);
 
@@ -183,7 +185,6 @@ LRESULT CALLBACK RosImageProc(HWND hwnd, UINT uMsg, WPARAM wParam,
LPARAM lParam
                     iDevsHeight = rcCredits.bottom - rcCredits.top;
 
                     hCreditsBitmap = CreateBitmap(pImgInfo->cxSource, (2 *
pImgInfo->cySource) + iDevsHeight + 1, pImgInfo->iPlanes, pImgInfo->iBits,
NULL);
-
                     if (!hCreditsBitmap)
                         goto Cleanup;