Switch row/col to x/y in order to improve clarity.

RS matrices use column major ordering. The previous parameter names made this
very confusing to users of the API.

Change-Id: I1f3a53c4a7563416933acef4260b33d87468308e
diff --git a/rsMatrix3x3.h b/rsMatrix3x3.h
index f96d270..05249b1 100644
--- a/rsMatrix3x3.h
+++ b/rsMatrix3x3.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2011 The Android Open Source Project
+ * Copyright (C) 2011-2012 The Android Open Source Project
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -25,12 +25,12 @@
 namespace renderscript {
 
 struct Matrix3x3 : public rs_matrix3x3 {
-    inline float get(uint32_t row, uint32_t col) const {
-        return m[row*3 + col];
+    inline float get(uint32_t x, uint32_t y) const {
+        return m[x*3 + y];
     }
 
-    inline void set(uint32_t row, uint32_t col, float v) {
-        m[row*3 + col] = v;
+    inline void set(uint32_t x, uint32_t y, float v) {
+        m[x*3 + y] = v;
     }
 
     void loadIdentity();
@@ -51,12 +51,4 @@
 }
 }
 
-
-
-
-#endif
-
-
-
-
-
+#endif  // ANDROID_RS_MATRIX_3x3_H