ignore SIGPIPE from subprocesses spawned with reproc

.gitignore

@@ -8,3 +8,4 @@ subprojects/lua
 subprojects/libagg
 subprojects/reproc
 lite
+error.txt

src/main.c

@@ -12,6 +12,7 @@
   #include <X11/Xlib.h>
   #include <X11/Xatom.h>
   #include <X11/Xresource.h>
+  #include <signal.h>
 #elif __APPLE__
   #include <mach-o/dyld.h>
 #endif
@@ -106,6 +107,8 @@ int main(int argc, char **argv) {
   HINSTANCE lib = LoadLibrary("user32.dll");
   int (*SetProcessDPIAware)() = (void*) GetProcAddress(lib, "SetProcessDPIAware");
   SetProcessDPIAware();
+#else
+  signal(SIGPIPE, SIG_IGN);
 #endif
 
   SDL_Init(SDL_INIT_VIDEO | SDL_INIT_EVENTS);