Compile with -Wstrict-overflow=1, not =5.

When disabling ARCH_MIN_SSE2, the ANSI code path triggers several untraceable warnings that are nonsense (like integer union members giving warnings about pointer overflow).  GCC purportedly has raised false positives with the overflow detection setting this high.  Since it cannot give reliable reports in the ANSI code path for this RSP plugin (which does very little with what are actually pointers anyway in the vector unit), the level has been lowered down to 1.

make.sh

@@ -28,7 +28,7 @@ FLAGS_x86="\
     -pedantic \
     -Wall -Wshadow -Wredundant-decls -Wextra -Wcast-align -Wcast-qual \
     -Wdisabled-optimization -Wformat=2 -Winit-self -Wlogical-op
-    -Wmissing-include-dirs -Wstrict-overflow=5 -Wundef -Wno-unused \
+    -Wmissing-include-dirs -Wstrict-overflow=1 -Wundef -Wno-unused \
     -Wno-variadic-macros -Wno-parentheses -fdiagnostics-show-option"
 else
 FLAGS_x86="\
@@ -41,7 +41,7 @@ FLAGS_x86="\
     -pedantic \
     -Wall -Wshadow -Wredundant-decls -Wextra -Wcast-align -Wcast-qual \
     -Wdisabled-optimization -Wformat=2 -Winit-self -Wlogical-op
-    -Wmissing-include-dirs -Wstrict-overflow=5 -Wundef -Wno-unused \
+    -Wmissing-include-dirs -Wstrict-overflow=1 -Wundef -Wno-unused \
     -Wno-variadic-macros -Wno-parentheses -fdiagnostics-show-option"
 fi
 C_FLAGS=$FLAGS_x86 # default since Intel SIMD was the most tested