detect more floats/doubles, including from relocations

src/d/bg/d_bg_s.cpp

@@ -38,6 +38,8 @@ struct dBgS_Acch {
     /* 8007732C */ void CalcWallRR();
 };
 
+struct cXyz {};
+
 struct cBgS_PolyInfo {
     /* 802680F8 */ void ChkSetInfo() const;
     /* 80268120 */ void ClearPi();
@@ -48,8 +50,6 @@ struct cBgS_PolyInfo {
 
 struct csXyz {};
 
-struct cXyz {};
-
 struct dBgS {
     /* 80030C50 */ ~dBgS();
     /* 800748FC */ void Ct();