Fixed some compiler warnings on old gcc versions.

dlls/dxdiagn/container.c

@@ -150,7 +150,7 @@ HRESULT WINAPI IDxDiagContainerImpl_GetChildContainer(PDXDIAGCONTAINER iface, LP
     hr = IDxDiagContainerImpl_GetChildContainerInternal(pContainer, tmp, &pContainer);
     if (!SUCCEEDED(hr) || NULL == pContainer)
       goto on_error;
-    *cur++; /* go after '.' (just replaced by \0) */
+    cur++; /* go after '.' (just replaced by \0) */
     tmp = cur;
     cur = strchrW(tmp, '.');
   }

dlls/ole32/ole2.c

@@ -801,7 +801,7 @@ static HRESULT WINAPI EnumOLEVERB_Next(
         rgelt->grfAttribs = atolW(pwszAttribs);
 
         if (pceltFetched)
-            *pceltFetched++;
+            (*pceltFetched)++;
         This->index++;
     }
     return hr;

dlls/ole32/oleobj.c

@@ -129,7 +129,7 @@ static HRESULT WINAPI EnumOleSTATDATA_Next(
         rgelt->dwConnection = This->index;
 
         if (pceltFetched)
-            *pceltFetched++;
+            (*pceltFetched)++;
         This->index++;
     }
     return hr;

dlls/riched20/editor.c

@@ -2552,7 +2552,7 @@ int ME_AutoURLDetect(ME_TextEditor *editor, WCHAR curChar)
   int sel_min, sel_max;
   int car_pos = 0;
   int text_pos=-1;
-  int URLmin, URLmax;
+  int URLmin, URLmax = 0;
   CHARRANGE url;
   FINDTEXTA ft;
   CHARFORMAT2W cur_format;

dlls/riched20/tests/editor.c

@@ -621,15 +621,9 @@ static void test_EM_SCROLL()
   SendMessage(hwndRichEdit, WM_SETTEXT, 0, (LPARAM) "a");/* one line of text */
   expr = 0x00010000;
   for (i = 0; i < 4; i++) {
-    int cmd;
-    switch (i) {
-    case 0: cmd = SB_PAGEDOWN; break;
-    case 1: cmd = SB_PAGEUP; break;
-    case 2: cmd = SB_LINEDOWN; break;
-    case 3: cmd = SB_LINEUP; break;
-    }
-    
-    r = SendMessage(hwndRichEdit, EM_SCROLL, cmd, 0);
+    static const int cmd[4] = { SB_PAGEDOWN, SB_PAGEUP, SB_LINEDOWN, SB_LINEUP };
+
+    r = SendMessage(hwndRichEdit, EM_SCROLL, cmd[i], 0);
     y_after = SendMessage(hwndRichEdit, EM_GETFIRSTVISIBLELINE, 0, 0);
     ok(expr == r, "EM_SCROLL improper return value returned (i == %d). "
        "Got 0x%08x, expected 0x%08x\n", i, r, expr);

dlls/shell32/tests/shlfolder.c

@@ -858,7 +858,7 @@ static void test_SHGetPathFromIDList(void)
 
 	/* Test if we can get the path from the start menu "program files" PIDL. */
     hShell32 = GetModuleHandleA("shell32");
-    pSHGetSpecialFolderLocation = (HRESULT(WINAPI*)(HWND,int,LPITEMIDLIST*))GetProcAddress(hShell32, "SHGetSpecialFolderLocation");
+    pSHGetSpecialFolderLocation = (void *)GetProcAddress(hShell32, "SHGetSpecialFolderLocation");
 
     hr = pSHGetSpecialFolderLocation(NULL, CSIDL_PROGRAM_FILES, &pidlPrograms);
     ok(SUCCEEDED(hr), "SHGetFolderLocation failed: 0x%08lx\n", hr);

include/ddk/wdm.h

@@ -833,7 +833,7 @@ typedef struct _KUSER_SHARED_DATA {
     union {
         volatile KSYSTEM_TIME TickCount;
         volatile ULONG64 TickCountQuad;
-    };
+    } DUMMYUNIONNAME;
 } KSHARED_USER_DATA, *PKSHARED_USER_DATA;
 
 NTSTATUS WINAPI ObCloseHandle(IN HANDLE handle);

server/change.c

@@ -942,7 +942,7 @@ static char *get_basename( const char *link )
     while (1)
     {
         buffer = malloc( n );
-        if (!buffer) break;
+        if (!buffer) return NULL;
 
         r = readlink( link, buffer, n );
         if (r < 0)