Fix a small parsing problem with arguments of type rs_matrix2x2, 3x3, 4x4.

Also fix some style issues and added a missing comment.

Change-Id: Ieaca181453f38f948bc2a5e3d183b264d7215413
diff --git a/api/GenerateHeaderFiles.cpp b/api/GenerateHeaderFiles.cpp
index db94b40..97ccab6 100644
--- a/api/GenerateHeaderFiles.cpp
+++ b/api/GenerateHeaderFiles.cpp
@@ -370,7 +370,7 @@
     return true;
 }
 
-bool GenerateHeaderFiles(const string& directory) {
+bool generateHeaderFiles(const string& directory) {
     bool success = true;
     for (auto specFile : systemSpecification.getSpecFiles()) {
         if (!writeHeaderFile(directory, *specFile)) {