Enable Visual Studio basic run-time checks in non-optimized builds [Oliver Stoneberg]

Flush stderr, so the data is actually written when output is being redirected [Oliver Stoneberg]

src/osd/windows/windows.mak

@@ -140,6 +140,11 @@ CCOMFLAGS += /wd4267
 #LIBS += -lbufferoverflowu
 endif
 
+# enable basic run-time checks in non-optimized build
+ifeq ($(OPTIMIZE),0)
+CCOMFLAGS += /RTC1
+endif
+
 # enable exception handling for C++
 CPPONLYFLAGS += /EHsc
 

src/osd/windows/winmain.c

@@ -1174,6 +1174,9 @@ static LONG WINAPI exception_filter(struct _EXCEPTION_POINTERS *info)
 	// walk the stack
 	while (walker.unwind())
 		fprintf(stderr, "  %p: %p%s\n", (void *)walker.frame(), (void *)walker.ip(), (symbols == NULL) ? "" : symbols->symbol_for_address(walker.ip()));
+	
+	// flush stderr, so the data is actually written when output is being redirected
+	fflush(stderr);
 
 	// exit
 	return EXCEPTION_CONTINUE_SEARCH;