fix gcc version detection fallback stuff

latest_gcc_version should always just be X.x not X.x.x
this broke some warning flags for me

src/Makefile.d/detect.mk

@@ -64,7 +64,7 @@ endif
 
 # This must have high to low order.
 gcc_versions:=\
-	151 150 15\
+	152 151 150 15\
 	142 141 140 14\
 	132 131 130 13\
 	123 122 121 120 12\
@@ -77,7 +77,7 @@ gcc_versions:=\
 	55 54 53 52 51 50\
 	49 48 47 46 45 44 43 42 41 40
 
-latest_gcc_version:=15.1.1
+latest_gcc_version:=15.2
 
 # Automatically set version flag, but not if one was
 # manually set. And don't bother if this is a clean only

src/Makefile.d/versions.mk

@@ -20,7 +20,7 @@ $(foreach v,$(join $(wordlist 2,$(_n),- $(gcc_versions)),\
 CXXFLAGS+= -Wno-aggregate-return
 
 # -W -Wno-unused
-WFLAGS:=-Wall -Wno-trigraphs -Wshadow -Wnull-dereference
+WFLAGS:=-Wall -Wno-trigraphs -Wnull-dereference
 ifndef GCC295
 #WFLAGS+=-Wno-packed
 endif
@@ -37,6 +37,9 @@ WFLAGS+=-Wfloat-equal
 ifndef GCC295
  WFLAGS+=-Wendif-labels
 endif
+ifdef GCC41
+ WFLAGS+=-Wshadow
+endif
 #WFLAGS+=-Wlarger-than-%len%
  WFLAGS+=-Wpointer-arith
  CWFLAGS+=-Wbad-function-cast