[PATCH] tapi32: Add error checks for lineInitialize

[Vijay Kiran Kamuju]

Signed-off-by: Vijay Kiran Kamuju <infyquest at gmail.com>
---
 dlls/tapi32/line.c       | 4 ++++
 dlls/tapi32/tests/tapi.c | 8 ++++----
 2 files changed, 8 insertions(+), 4 deletions(-)

diff --git a/dlls/tapi32/line.c b/dlls/tapi32/line.c
index a44ac1a1a726..a978e8e69321 100644
--- a/dlls/tapi32/line.c
+++ b/dlls/tapi32/line.c
@@ -1165,6 +1165,10 @@ DWORD WINAPI lineInitialize(
 {
     FIXME("(%p, %p, %p, %s, %p): stub.\n", lphLineApp, hInstance,
 	  lpfnCallback, debugstr_a(lpszAppName), lpdwNumDevs);
+
+    if (!lphLineApp || !hInstance || !lpfnCallback || !lpdwNumDevs)
+        return LINERR_INVALPOINTER;
+
     return 0;
 }
 
diff --git a/dlls/tapi32/tests/tapi.c b/dlls/tapi32/tests/tapi.c
index 13772c8c7d49..e6fcc96b1853 100644
--- a/dlls/tapi32/tests/tapi.c
+++ b/dlls/tapi32/tests/tapi.c
@@ -35,16 +35,16 @@ static void test_lineInitialize(void)
     HLINEAPP lnApp;
 
     ret = lineInitialize(NULL, NULL, NULL, NULL, NULL);
-    todo_wine ok(ret == LINEERR_INVALPOINTER, "Expected return value LINEERR_INVALPOINTER, got %x.\n", ret);
+    ok(ret == LINEERR_INVALPOINTER, "Expected return value LINEERR_INVALPOINTER, got %x.\n", ret);
 
     ret = lineInitialize(&lnApp, NULL, NULL, NULL, NULL);
-    todo_wine ok(ret == LINEERR_INVALPOINTER, "Expected return value LINEERR_INVALPOINTER, got %x.\n", ret);
+    ok(ret == LINEERR_INVALPOINTER, "Expected return value LINEERR_INVALPOINTER, got %x.\n", ret);
 
     ret = lineInitialize(&lnApp, GetModuleHandleA(NULL), NULL, NULL, NULL);
-    todo_wine ok(ret == LINEERR_INVALPOINTER, "Expected return value LINEERR_INVALPOINTER, got %x.\n", ret);
+    ok(ret == LINEERR_INVALPOINTER, "Expected return value LINEERR_INVALPOINTER, got %x.\n", ret);
 
     ret = lineInitialize(&lnApp, GetModuleHandleA(NULL), line_callback, NULL, NULL);
-    todo_wine ok(ret == LINEERR_INVALPOINTER, "Expected return value LINEERR_INVALPOINTER, got %x.\n", ret);
+    ok(ret == LINEERR_INVALPOINTER, "Expected return value LINEERR_INVALPOINTER, got %x.\n", ret);
 
     ret = lineInitialize(&lnApp, GetModuleHandleA(NULL), line_callback, NULL, &dev);
     ok(!ret, "unexpected return value, got %u.\n", ret);
-- 
2.21.0