[gtk+] test/gtkgears.c: Fix on C89 Compilers

[Chun-wei Fan <fanchunwei src gnome org>]

commit b3725a455ddd6ecca2e6cac55ac0ebd387f454e5
Author: Chun-wei Fan <fanchunwei src gnome org>
Date:   Fri Mar 6 11:01:30 2015 +0800

    test/gtkgears.c: Fix on C89 Compilers
    
    Make sure that variables are declared at the top of the block.
    
    Break up one of the sincos() calls into individual calls to sin() and cos()
    so that we do not have to complicate the initialization of the following
    GLfloat array.

 tests/gtkgears.c |    7 +++----
 1 files changed, 3 insertions(+), 4 deletions(-)
---
diff --git a/tests/gtkgears.c b/tests/gtkgears.c
index fe36bf4..7a28071 100644
--- a/tests/gtkgears.c
+++ b/tests/gtkgears.c
@@ -408,9 +408,9 @@ multiply (GLfloat *m, const GLfloat *n)
 static void
 rotate(GLfloat *m, GLfloat angle, GLfloat x, GLfloat y, GLfloat z)
 {
-   double s, c;
+   double s = sin (angle);
+   double c = cos (angle);
 
-   sincos(angle, &s, &c);
    GLfloat r[16] = {
       x * x * (1 - c) + c,     y * x * (1 - c) + z * s, x * z * (1 - c) - y * s, 0,
       x * y * (1 - c) - z * s, y * y * (1 - c) + c,     y * z * (1 - c) + x * s, 0,
@@ -511,10 +511,9 @@ invert(GLfloat *m)
 void perspective(GLfloat *m, GLfloat fovy, GLfloat aspect, GLfloat zNear, GLfloat zFar)
 {
    GLfloat tmp[16];
-   identity(tmp);
-
    double sine, cosine, cotangent, deltaZ;
    GLfloat radians = fovy / 2 * M_PI / 180;
+   identity(tmp);
 
    deltaZ = zFar - zNear;
    sincos(radians, &sine, &cosine);