The forward declare should be a struct instead of a class (to be consistent with the definition, as well as to silence an MSVC C4099 warning).

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204928 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Target/Mips/MCTargetDesc/MipsAsmBackend.h

@@ -22,7 +22,7 @@
 namespace llvm {
 
 class MCAssembler;
-class MCFixupKindInfo;
+struct MCFixupKindInfo;
 class Target;
 class MCObjectWriter;