Fix debugger with GL to work with non-default locale

debugger/debuggermain.cpp

Index: debugger/debuggermain.cpp
diff --git a/debugger/debuggermain.cpp b/debugger/debuggermain.cpp
index f749911a982a8185fdd0071717b35e17b5ab100d..d537d363c9818a8111e91e700fb3b8393541bbbf 100644
--- a/debugger/debuggermain.cpp
+++ b/debugger/debuggermain.cpp
@@ -17,8 +17,13 @@ static void usage(const char * argv0) {
 }
 
 int main(int argc, char *argv[]) {
+#ifndef SK_BUILD_FOR_WIN32
+    // Set numeric formatting to default. Otherwise shaders will have numbers with wrong comma.
+    // QApplication documentation recommends setlocale("LC_NUMERIC", "C") after QApplication
+    // constuction.  However, the components Qt calls (X11 libs, ..) will override that.
+    setenv("LC_NUMERIC", "C", 1);
+#endif
     QApplication a(argc, argv);
-
     QStringList argList = a.arguments();
 
     if (argList.count() <= 0) {