Remove FX_Alloc() null checks now that it can't return NULL.

core/src/fxcrt/fx_extension.cpp

Index: core/src/fxcrt/fx_extension.cpp
diff --git a/core/src/fxcrt/fx_extension.cpp b/core/src/fxcrt/fx_extension.cpp
index 4790aee00d98eda6bc62ddbcc9803f0b289037eb..20e2e1a3203c065cadc435e4706c2e0de870ef49 100644
--- a/core/src/fxcrt/fx_extension.cpp
+++ b/core/src/fxcrt/fx_extension.cpp
@@ -275,9 +275,6 @@ extern "C" {
 FX_LPVOID FX_Random_MT_Start(FX_DWORD dwSeed)
 {
     FX_LPMTRANDOMCONTEXT pContext = FX_Alloc(FX_MTRANDOMCONTEXT, 1);
-    if (!pContext) {
-        return NULL;
-    }
     pContext->mt[0] = dwSeed;
     FX_DWORD &i = pContext->mti;
     FX_LPDWORD pBuf = pContext->mt;