[NFC] Corrected typo.

ClassMetadataLayout::getOffsett -> ClassMetadataLayout::getOffset

Author: nate-chandler

lib/IRGen/GenClass.cpp

@@ -2522,7 +2522,7 @@ FunctionPointer irgen::emitVirtualMethodValue(IRGenFunction &IGF,
     IGF.IGM.getClassMetadataLayout(classDecl).getMethodInfo(IGF, method);
   switch (methodInfo.getKind()) {
   case ClassMetadataLayout::MethodInfo::Kind::Offset: {
-    auto offset = methodInfo.getOffsett();
+    auto offset = methodInfo.getOffset();
 
     auto slot = IGF.emitAddressAtOffset(metadata, offset,
                                         signature.getType()->getPointerTo(),

lib/IRGen/MetadataLayout.h

@@ -188,7 +188,7 @@ class ClassMetadataLayout : public NominalMetadataLayout {
 
     Kind getKind() const { return TheKind; }
 
-    Offset getOffsett() const {
+    Offset getOffset() const {
       assert(getKind() == Kind::Offset);
       return TheOffset;
     }