Use std::string::data() instead of std::string::c_str().

Meaningless changes on meaningless day.

src/AbstractShaderProgram.cpp

@@ -298,15 +298,15 @@ void AbstractShaderProgram::attachShader(Shader& shader) {
 }
 
 void AbstractShaderProgram::bindAttributeLocation(UnsignedInt location, const std::string& name) {
-    glBindAttribLocation(_id, location, name.c_str());
+    glBindAttribLocation(_id, location, name.data());
 }
 
 #ifndef MAGNUM_TARGET_GLES
 void AbstractShaderProgram::bindFragmentDataLocation(UnsignedInt location, const std::string& name) {
-    glBindFragDataLocation(_id, location, name.c_str());
+    glBindFragDataLocation(_id, location, name.data());
 }
 void AbstractShaderProgram::bindFragmentDataLocationIndexed(UnsignedInt location, UnsignedInt index, const std::string& name) {
-    glBindFragDataLocationIndexed(_id, location, index, name.c_str());
+    glBindFragDataLocationIndexed(_id, location, index, name.data());
 }
 #endif
 
@@ -347,7 +347,7 @@ bool AbstractShaderProgram::link() {
 }
 
 Int AbstractShaderProgram::uniformLocation(const std::string& name) {
-    GLint location = glGetUniformLocation(_id, name.c_str());
+    GLint location = glGetUniformLocation(_id, name.data());
     if(location == -1)
         Warning() << "AbstractShaderProgram: location of uniform \'" + name + "\' cannot be retrieved!";
     return location;

src/DebugMarker.cpp

@@ -51,10 +51,10 @@ void DebugMarker::markImplementationDefault(const std::string&) {}
 void DebugMarker::markImplementationDebugger(const std::string& string) {
     /** @todo Re-enable when extension wrangler is available for ES */
     #ifndef MAGNUM_TARGET_GLES
-    glStringMarkerGREMEDY(string.length(), string.c_str());
+    glStringMarkerGREMEDY(string.length(), string.data());
     #else
     #if 0
-    glInsertEventMarkerEXT(string.length(), string.c_str());
+    glInsertEventMarkerEXT(string.length(), string.data());
     #else
     static_cast<void>(string);
     #endif