Remove NULL check for pDlgroup for consistency with other SetValue API

+ Callers would invariably check for NULL after Allocate / Create
  anyway, so this would be a duplicate check
+ Also resolve some nitpick issues in build for razzle / build with
  Linux with jitterentropy

.gitmodules

@@ -5,3 +5,4 @@
 [submodule "jitterentropy-library"]
 	path = jitterentropy-library
 	url = https://github.com/smuellerDD/jitterentropy-library
+	ignore = untracked

inc/symcrypt.h

@@ -5220,8 +5220,6 @@ SymCryptDlgroupSetValueSafePrime(
 // to 0 in allocation (equivalent to nBitsOfQ = (nBitsOfP-1)) when creating a safe-prime group.
 //
 // Requirements:
-//  - pDlgroup!=NULL. Otherwise it returns SYMCRYPT_INVALID_ARGUMENT.
-//
 //  - pDlgroup was allocated with sufficient bits for the selected P (and Q) to fit. If there is no
 //    named safe-prime group with bit size <= the allocated size, it returns SYMCRYPT_INVALID_ARGUMENT.
 //    The minimum currently supported bitsize of named safe-prime groups is nBitsOfP = 2048.

lib/dlgroup.c

@@ -1097,7 +1097,7 @@ SymCryptDlgroupSetValueSafePrime(
     UINT32 nMaxBitsOfP = SYMCRYPT_MIN(pDlgroup->nMaxBitsOfP, pDlgroup->nMaxBitsOfQ+1);
     UINT32 nMaxDigitsOfP;
 
-    if ( pDlgroup == NULL || dhSafePrimeType == SYMCRYPT_DLGROUP_DH_SAFEPRIMETYPE_NONE )
+    if ( dhSafePrimeType == SYMCRYPT_DLGROUP_DH_SAFEPRIMETYPE_NONE )
     {
         scError = SYMCRYPT_INVALID_ARGUMENT;
         goto cleanup;

unittest/lib/main_sys_common.cpp

@@ -68,7 +68,7 @@ scheduleAsyncTest( SelfTestFn f, BYTE rnd )
 {
     PKDPC   pDpc;
 
-    pDpc = (PKDPC) ExAllocatePoolWithTag( NonPagedPoolNx, sizeof( KDPC ), 'TcCS' );
+    pDpc = (PKDPC) ExAllocatePoolZero( NonPagedPoolNx, sizeof( KDPC ), 'TcCS' );
     if( pDpc == NULL )
     {
         return;